Shares and Assets.

src/main/java/org/hostsharing/hsadminng/domain/Asset.java

@@ -21,6 +21,8 @@ import org.hostsharing.hsadminng.domain.enumeration.AssetAction;
 public class Asset implements Serializable {
 
     private static final long serialVersionUID = 1L;
+
+    public static final String ENTITY_NAME = "asset";
     
     @Id
     @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "sequenceGenerator")

src/main/java/org/hostsharing/hsadminng/service/AssetService.java

@@ -26,10 +26,12 @@ public class AssetService {
     private final AssetRepository assetRepository;
 
     private final AssetMapper assetMapper;
+    private final AssetValidator assetValidator;
 
-    public AssetService(AssetRepository assetRepository, AssetMapper assetMapper) {
+    public AssetService(AssetRepository assetRepository, AssetMapper assetMapper, AssetValidator assetValidator ) {
         this.assetRepository = assetRepository;
         this.assetMapper = assetMapper;
+        this.assetValidator = assetValidator;
     }
 
     /**
@@ -40,6 +42,9 @@ public class AssetService {
      */
     public AssetDTO save(AssetDTO assetDTO) {
         log.debug("Request to save Asset : {}", assetDTO);
+
+        assetValidator.validate(assetDTO);
+
         Asset asset = assetMapper.toEntity(assetDTO);
         asset = assetRepository.save(asset);
         return assetMapper.toDto(asset);

src/main/java/org/hostsharing/hsadminng/service/AssetValidator.java

@@ -0,0 +1,43 @@
+package org.hostsharing.hsadminng.service;
+
+import org.hostsharing.hsadminng.domain.Asset;
+import org.hostsharing.hsadminng.domain.enumeration.AssetAction;
+import org.hostsharing.hsadminng.service.dto.AssetDTO;
+import org.hostsharing.hsadminng.web.rest.errors.BadRequestAlertException;
+import org.springframework.stereotype.Service;
+
+import java.math.BigDecimal;
+
+@Service
+public class AssetValidator {
+    public void validate(final AssetDTO assetDTO) {
+        if (assetDTO.getId() != null) {
+            throw new BadRequestAlertException("Asset transactions are immutable", Asset.ENTITY_NAME, "assetTransactionImmutable");
+        }
+
+        if (assetDTO.getDocumentDate().isAfter(assetDTO.getValueDate())) {
+            throw new BadRequestAlertException("Document date may not be after value date", Asset.ENTITY_NAME, "documentDateMayNotBeAfterValueDate");
+        }
+
+        if ((assetDTO.getAction() == AssetAction.PAYMENT) && (assetDTO.getAmount().compareTo(BigDecimal.valueOf(0)) <= 0)) {
+            throw new BadRequestAlertException("Asset payments require a positive amount", Asset.ENTITY_NAME, "assetPaymentsPositiveAmount");
+        }
+        if ((assetDTO.getAction() == AssetAction.ADOPTION) && (assetDTO.getAmount().compareTo(BigDecimal.valueOf(0)) <= 0)) {
+            throw new BadRequestAlertException("Asset adoptions require a positive amount", Asset.ENTITY_NAME, "assetAdoptionsPositiveAmount");
+        }
+
+        if ((assetDTO.getAction() == AssetAction.PAYBACK) && (assetDTO.getAmount().compareTo(BigDecimal.valueOf(0)) >= 0)) {
+            throw new BadRequestAlertException("Asset paybacks require a negative amount", Asset.ENTITY_NAME, "assetPaybacksNegativeAmount");
+        }
+        if ((assetDTO.getAction() == AssetAction.HANDOVER) && (assetDTO.getAmount().compareTo(BigDecimal.valueOf(0)) >= 0)) {
+            throw new BadRequestAlertException("Asset handovers require a negative amount", Asset.ENTITY_NAME, "assetHandoversNegativeAmount");
+        }
+        if ((assetDTO.getAction() == AssetAction.LOSS) && (assetDTO.getAmount().compareTo(BigDecimal.valueOf(0)) >= 0)) {
+            throw new BadRequestAlertException("Asset losses require a negative amount", Asset.ENTITY_NAME, "assetLossesNegativeAmount");
+        }
+        if ((assetDTO.getAction() == AssetAction.CLEARING) && (assetDTO.getAmount().compareTo(BigDecimal.valueOf(0)) >= 0)) {
+            throw new BadRequestAlertException("Asset clearings require a negative amount", Asset.ENTITY_NAME, "assetClearingsNegativeAmount");
+        }
+
+    }
+}

src/main/java/org/hostsharing/hsadminng/service/ShareService.java

@@ -28,9 +28,12 @@ public class ShareService {
 
     private final ShareMapper shareMapper;
 
-    public ShareService(ShareRepository shareRepository, ShareMapper shareMapper) {
+    private final ShareValidator shareValidator;
+
+    public ShareService(ShareRepository shareRepository, ShareMapper shareMapper, ShareValidator shareValidator) {
         this.shareRepository = shareRepository;
         this.shareMapper = shareMapper;
+        this.shareValidator = shareValidator;
     }
 
     /**
@@ -42,16 +45,8 @@ public class ShareService {
     public ShareDTO save(ShareDTO shareDTO) {
         log.debug("Request to save Share : {}", shareDTO);
 
-        if (shareDTO.getId() != null) {
+        shareValidator.validate(shareDTO);
-            throw new BadRequestAlertException("Share transactions are immutable", Share.ENTITY_NAME, "shareTransactionImmutable");
-        }
 
-        if((shareDTO.getAction() == ShareAction.SUBSCRIPTION) && (shareDTO.getQuantity() <= 0)) {
-            throw new BadRequestAlertException("Share subscriptions require a positive quantity", Share.ENTITY_NAME, "shareSubscriptionPositivQuantity");
-        }
-        if((shareDTO.getAction() == ShareAction.CANCELLATION) && (shareDTO.getQuantity() >= 0)) {
-            throw new BadRequestAlertException("Share cancellations require a negative quantity", Share.ENTITY_NAME, "shareCancellationNegativeQuantity");
-        }
         Share share = shareMapper.toEntity(shareDTO);
         share = shareRepository.save(share);
         return shareMapper.toDto(share);

src/main/java/org/hostsharing/hsadminng/service/ShareValidator.java

@@ -0,0 +1,30 @@
+package org.hostsharing.hsadminng.service;
+
+import org.hostsharing.hsadminng.domain.Share;
+import org.hostsharing.hsadminng.domain.enumeration.ShareAction;
+import org.hostsharing.hsadminng.service.dto.ShareDTO;
+import org.hostsharing.hsadminng.web.rest.errors.BadRequestAlertException;
+import org.springframework.stereotype.Service;
+
+@Service
+public class ShareValidator {
+
+    public void validate(final ShareDTO shareDTO) {
+        if (shareDTO.getId() != null) {
+            throw new BadRequestAlertException("Share transactions are immutable", Share.ENTITY_NAME, "shareTransactionImmutable");
+        }
+
+        if (shareDTO.getDocumentDate().isAfter(shareDTO.getValueDate())) {
+            throw new BadRequestAlertException("Document date may not be after value date", Share.ENTITY_NAME, "documentDateMayNotBeAfterValueDate");
+        }
+
+        if ((shareDTO.getAction() == ShareAction.SUBSCRIPTION) && (shareDTO.getQuantity() <= 0)) {
+            throw new BadRequestAlertException("Share subscriptions require a positive quantity", Share.ENTITY_NAME, "shareSubscriptionPositiveQuantity");
+        }
+
+        if ((shareDTO.getAction() == ShareAction.CANCELLATION) && (shareDTO.getQuantity() >= 0)) {
+            throw new BadRequestAlertException("Share cancellations require a negative quantity", Share.ENTITY_NAME, "shareCancellationNegativeQuantity");
+        }
+
+    }
+}

src/main/webapp/i18n/de/asset.json

@@ -2,25 +2,25 @@
     "hsadminNgApp": {
         "asset": {
             "home": {
-                "title": "Assets",
+                "title": "Geschäftsguthaben-Transaktionen",
-                "createLabel": "Asset erstellen",
+                "createLabel": "Geschäftsguthaben-Transaktion erfassen",
-                "createOrEditLabel": "Asset erstellen oder bearbeiten"
+                "createOrEditLabel": "Geschäftsguthaben-Transaktion erfassen oder bearbeiten"
             },
-            "created": "Asset erstellt mit ID {{ param }}",
+            "created": "Geschäftsguthaben-Transaktion erfasst mit ID {{ param }}",
-            "updated": "Asset aktualisiert mit ID {{ param }}",
+            "updated": "Geschäftsguthaben-Transaktion aktualisiert mit ID {{ param }}",
-            "deleted": "Asset gelöscht mit ID {{ param }}",
+            "deleted": "Geschäftsguthaben-Transaktion gelöscht mit ID {{ param }}",
             "delete": {
-                "question": "Soll Asset {{ id }} wirklich dauerhaft gelöscht werden?"
+                "question": "Soll die Geschäftsguthaben-Transaktion {{ id }} wirklich dauerhaft gelöscht werden?"
             },
             "detail": {
-                "title": "Asset"
+                "title": "Geschäftsguthaben-Transaktion"
             },
-            "documentDate": "Document Date",
+            "documentDate": "Belegdatum",
-            "valueDate": "Value Date",
+            "valueDate": "Buchungsdatum",
-            "action": "Action",
+            "action": "Transaktion",
-            "amount": "Amount",
+            "amount": "Betrag",
-            "remark": "Remark",
+            "remark": "Bemerkung",
-            "membership": "Membership"
+            "membership": "zugehörige Mitgliedschaft"
         }
     }
 }

src/main/webapp/i18n/de/assetAction.json

@@ -2,12 +2,12 @@
     "hsadminNgApp": {
         "AssetAction": {
             "null": "",
-            "PAYMENT": "PAYMENT",
+            "PAYMENT": "Einzahlung",
-            "HANDOVER": "HANDOVER",
+            "HANDOVER": "Übertragung",
-            "ADOPTION": "ADOPTION",
+            "ADOPTION": "Übernahme",
-            "LOSS": "LOSS",
+            "LOSS": "Verlust",
-            "CLEARING": "CLEARING",
+            "CLEARING": "Verrechnung",
-            "PAYBACK": "PAYBACK"
+            "PAYBACK": "Auszahlung"
         }
     }
 }

src/main/webapp/i18n/de/custom-error.json

@@ -1,10 +1,17 @@
 {
     "error": {
-        "shareSubscriptionPositivQuantity": "Zeichnungen von Geschäftsanteilen erfordern eine positive Stückzahl",
+        "shareSubscriptionPositiveQuantity": "Zeichnungen von Geschäftsanteilen erfordern eine positive Stückzahl",
         "shareCancellationNegativeQuantity": "Kündigungen von Geschäftsanteilen erfordern eine negative Stückzahl",
         "shareTransactionImmutable": "Transaktionen mit Geschäftsanteilen sind unveränderlich",
         "membershipNotDeletable": "Mitgliedschaft kann nicht gelöscht werden, setze stattdessen das 'untilDate'",
-        "untilDateMustBeAfterSinceDate": "Mitgliedshafts-Austrittsdatum muss nach dem Beitrittsdatum liegen",
+        "untilDateMustBeAfterSinceDate": "Mitgliedshaftsaustrittsdatum muss nach dem Beitrittsdatum liegen",
-        "anotherUncancelledMembershipExists": "Nur eine einzige ungekündigte Mitgliedschaft pro Kunde ist zulässig"
+        "documentDateMayNotBeAfterValueDate": "Belegdatum darf nicht vor dem Buchungsdatum liegen",
+        "anotherUncancelledMembershipExists": "Nur eine einzige ungekündigte Mitgliedschaft pro Kunde ist zulässig",
+        "assetPaymentsPositiveAmount": "Einzahlungen von Geschäftsguthaben erfordern einen positiven Betrag",
+        "assetAdoptionsPositiveAmount": "Übernahmen von Geschäftsguthaben erfordern einen positiven Betrag",
+        "assetPaybacksNegativeAmount": "Auszahlungen von Geschäftsguthaben erfordern einen negativen Betrag",
+        "assetHandoversNegativeAmount": "Übertragungen von Geschäftsguthaben erfordern einen negativen Betrag",
+        "assetLossesNegativeAmount": "Verluste von Geschäftsguthaben erfordern einen negativen Betrag",
+        "assetClearingsNegativeAmount": "Verrechnungen von Geschäftsguthaben erfordern einen negativen Betrag"
     }
 }

src/main/webapp/i18n/de/share.json

@@ -2,25 +2,25 @@
     "hsadminNgApp": {
         "share": {
             "home": {
-                "title": "Shares",
+                "title": "Geschäftsanteil-Transaktionen",
-                "createLabel": "Share erstellen",
+                "createLabel": "Geschäftsanteil-Transaktion erfassen",
-                "createOrEditLabel": "Share erstellen oder bearbeiten"
+                "createOrEditLabel": "Geschäftsanteil-Transaktion erfassen oder bearbeiten"
             },
-            "created": "Share erstellt mit ID {{ param }}",
+            "created": "Geschäftsanteil-Transaktion erfasst mit ID {{ param }}",
-            "updated": "Share aktualisiert mit ID {{ param }}",
+            "updated": "Geschäftsanteil-Transaktion aktualisiert mit ID {{ param }}",
-            "deleted": "Share gelöscht mit ID {{ param }}",
+            "deleted": "Geschäftsanteil-Transaktion gelöscht mit ID {{ param }}",
             "delete": {
-                "question": "Soll Share {{ id }} wirklich dauerhaft gelöscht werden?"
+                "question": "Soll die Geschäftsanteil-Transaktion {{ id }} wirklich dauerhaft gelöscht werden?"
             },
             "detail": {
-                "title": "Share"
+                "title": "Geschäftsanteil-Transaktion"
             },
-            "documentDate": "Document Date",
+            "documentDate": "Belegdatum",
-            "valueDate": "Value Date",
+            "valueDate": "Buchungsdatum",
-            "action": "Action",
+            "action": "Aktion",
-            "quantity": "Quantity",
+            "quantity": "Anzahl",
-            "remark": "Remark",
+            "remark": "Bemerkung",
-            "membership": "Membership"
+            "membership": "zugehörige Mitgliedschaft"
         }
     }
 }

src/main/webapp/i18n/de/shareAction.json

@@ -2,8 +2,8 @@
     "hsadminNgApp": {
         "ShareAction": {
             "null": "",
-            "SUBSCRIPTION": "SUBSCRIPTION",
+            "SUBSCRIPTION": "Zeichnung",
-            "CANCELLATION": "CANCELLATION"
+            "CANCELLATION": "Kündigung"
         }
     }
 }

src/main/webapp/i18n/en/asset.json

@@ -2,25 +2,25 @@
     "hsadminNgApp": {
         "asset": {
             "home": {
-                "title": "Assets",
+                "title": "Asset Transactions",
-                "createLabel": "Create a new Asset",
+                "createLabel": "Register a new asset transaction",
-                "createOrEditLabel": "Create or edit a Asset"
+                "createOrEditLabel": "Register or edit an asset transaction"
             },
-            "created": "A new Asset is created with identifier {{ param }}",
+            "created": "A new asset transaction is registered with identifier {{ param }}",
-            "updated": "A Asset is updated with identifier {{ param }}",
+            "updated": "An asset transaction is updated with identifier {{ param }}",
-            "deleted": "A Asset is deleted with identifier {{ param }}",
+            "deleted": "An asset transaction is deleted with identifier {{ param }}",
             "delete": {
-                "question": "Are you sure you want to delete Asset {{ id }}?"
+                "question": "Are you sure you want to delete asset transaction {{ id }}?"
             },
             "detail": {
-                "title": "Asset"
+                "title": "Asset transaction"
             },
-            "documentDate": "Document Date",
+            "documentDate": "Document date",
-            "valueDate": "Value Date",
+            "valueDate": "Value date",
             "action": "Action",
             "amount": "Amount",
             "remark": "Remark",
-            "membership": "Membership"
+            "membership": "Related membership"
         }
     }
 }

src/main/webapp/i18n/en/assetAction.json

@@ -2,12 +2,12 @@
     "hsadminNgApp": {
         "AssetAction": {
             "null": "",
-            "PAYMENT": "PAYMENT",
+            "PAYMENT": "Payment",
-            "HANDOVER": "HANDOVER",
+            "HANDOVER": "Handover",
-            "ADOPTION": "ADOPTION",
+            "ADOPTION": "Adoption",
-            "LOSS": "LOSS",
+            "LOSS": "Loss",
-            "CLEARING": "CLEARING",
+            "CLEARING": "Clearing",
-            "PAYBACK": "PAYBACK"
+            "PAYBACK": "Payback"
         }
     }
 }

src/main/webapp/i18n/en/custom-error.json

@@ -1,10 +1,17 @@
 {
     "error": {
-        "shareSubscriptionPositivQuantity": "Share subscriptions require a positive quantity",
+        "shareSubscriptionPositiveQuantity": "Share subscriptions require a positive quantity",
         "shareCancellationNegativeQuantity": "Share cancellations require a negative quantity",
         "shareTransactionImmutable": "Share transactions are immutable",
         "membershipNotDeletable": "Membership cannot be deleted, instead set 'untilDate'",
         "untilDateMustBeAfterSinceDate": "Membership until date must be after since date",
-        "anotherUncancelledMembershipExists": "Only a single uncancelled membership allowed per customer"
+        "documentDateMayNotBeAfterValueDate": "Document date may not be after value date",
+        "anotherUncancelledMembershipExists": "Only a single uncancelled membership allowed per customer",
+        "assetPaymentsPositiveAmount": "Asset payments require a positive amount",
+        "assetAdoptionsPositiveAmount": "Asset adoptions require a positive amount",
+        "assetPaybacksNegativeAmount": "Asset paybacks require a negative amount",
+        "assetHandoversNegativeAmount": "Asset handovers require a negative amount",
+        "assetLossesNegativeAmount": "Asset losses require a negative amount",
+        "assetClearingsNegativeAmount": "Asset clearings require a negative amount"
     }
 }

src/main/webapp/i18n/en/share.json

@@ -2,25 +2,25 @@
     "hsadminNgApp": {
         "share": {
             "home": {
-                "title": "Shares",
+                "title": "Share Transactions",
-                "createLabel": "Create a new Share",
+                "createLabel": "Register a new share transaction",
-                "createOrEditLabel": "Create or edit a Share"
+                "createOrEditLabel": "Register or edit a share transaction"
             },
-            "created": "A new Share is created with identifier {{ param }}",
+            "created": "A new share transactions is registered with identifier {{ param }}",
-            "updated": "A Share is updated with identifier {{ param }}",
+            "updated": "A share transaction is updated with identifier {{ param }}",
-            "deleted": "A Share is deleted with identifier {{ param }}",
+            "deleted": "A share transcation is deleted with identifier {{ param }}",
             "delete": {
-                "question": "Are you sure you want to delete Share {{ id }}?"
+                "question": "Are you sure you want to delete share transaction {{ id }}?"
             },
             "detail": {
-                "title": "Share"
+                "title": "Share transaction"
             },
-            "documentDate": "Document Date",
+            "documentDate": "Document date",
-            "valueDate": "Value Date",
+            "valueDate": "Value date",
             "action": "Action",
             "quantity": "Quantity",
             "remark": "Remark",
-            "membership": "Membership"
+            "membership": "Related membership"
         }
     }
 }

src/main/webapp/i18n/en/shareAction.json

@@ -2,8 +2,8 @@
     "hsadminNgApp": {
         "ShareAction": {
             "null": "",
-            "SUBSCRIPTION": "SUBSCRIPTION",
+            "SUBSCRIPTION": "Subscription",
-            "CANCELLATION": "CANCELLATION"
+            "CANCELLATION": "Cancellation"
         }
     }
 }

src/test/java/org/hostsharing/hsadminng/service/AssetValidatorUnitTest.java

@@ -0,0 +1,205 @@
+package org.hostsharing.hsadminng.service;
+
+import org.assertj.core.api.AbstractThrowableAssert;
+import org.hostsharing.hsadminng.domain.enumeration.AssetAction;
+import org.hostsharing.hsadminng.service.dto.AssetDTO;
+import org.hostsharing.hsadminng.web.rest.errors.BadRequestAlertException;
+import org.junit.Test;
+
+import java.math.BigDecimal;
+import java.time.LocalDate;
+import java.util.function.Consumer;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.catchThrowableOfType;
+
+public class AssetValidatorUnitTest {
+
+    private AssetValidator assetValidator = new AssetValidator();
+
+    @Test
+    public void shouldAcceptValidAssetDTO() {
+        new GivenAssetValidationTestCase()
+            .withDocumentDate("2019-04-11").withValueDate("2019-04-12")
+            .withAction(AssetAction.PAYMENT).withAmount("64.00")
+            .when((AssetDTO assetDto) -> assetValidator.validate(assetDto))
+            .thenActualException().isNull();
+    }
+
+    @Test
+    public void shouldAcceptIfDocumentDateEqualsValueDate() {
+        new GivenAssetValidationTestCase()
+            .withDocumentDate("2019-04-11").withValueDate("2019-04-11")
+            .withAction(AssetAction.PAYMENT).withAmount("64.00")
+            .when((AssetDTO assetDto) -> assetValidator.validate(assetDto))
+            .thenActualException().isNull();
+    }
+
+    @Test
+    public void shouldRejectIfDocumentDateAfterValueDate() {
+        new GivenAssetValidationTestCase()
+            .withDocumentDate("2019-04-13").withValueDate("2019-04-12")
+            .withAction(AssetAction.PAYMENT).withAmount("64.00")
+            .when((AssetDTO assetDto) -> assetValidator.validate(assetDto))
+            .thenActualException().isEqualToComparingFieldByField(new BadRequestAlertException(
+            "Document date may not be after value date", "asset", "documentDateMayNotBeAfterValueDate"));
+    }
+
+    @Test
+    public void shouldRejectIfPaymentWithNegativeAmount() {
+        new GivenAssetValidationTestCase()
+            .withDocumentDate("2019-04-11").withValueDate("2019-04-12")
+            .withAction(AssetAction.PAYMENT).withAmount("-64.00")
+            .when((AssetDTO assetDto) -> assetValidator.validate(assetDto))
+            .thenActualException().isEqualToComparingFieldByField(new BadRequestAlertException(
+            "Asset payments require a positive amount", "asset", "assetPaymentsPositiveAmount"));
+    }
+
+    @Test
+    public void shouldRejectIfPaymentWithZeroAmount() {
+        new GivenAssetValidationTestCase()
+            .withDocumentDate("2019-04-11").withValueDate("2019-04-12")
+            .withAction(AssetAction.PAYMENT).withAmount("0.00")
+            .when((AssetDTO assetDto) -> assetValidator.validate(assetDto))
+            .thenActualException().isEqualToComparingFieldByField(new BadRequestAlertException(
+            "Asset payments require a positive amount", "asset", "assetPaymentsPositiveAmount"));
+    }
+
+    @Test
+    public void shouldRejectIfAdoptionWithNegativeAmount() {
+        new GivenAssetValidationTestCase()
+            .withDocumentDate("2019-04-11").withValueDate("2019-04-12")
+            .withAction(AssetAction.ADOPTION).withAmount("-64.00")
+            .when((AssetDTO assetDto) -> assetValidator.validate(assetDto))
+            .thenActualException().isEqualToComparingFieldByField(new BadRequestAlertException(
+            "Asset adoptions require a positive amount", "asset", "assetAdoptionsPositiveAmount"));
+    }
+
+    @Test
+    public void shouldRejectIfAdoptionWithZeroAmount() {
+        new GivenAssetValidationTestCase()
+            .withDocumentDate("2019-04-11").withValueDate("2019-04-12")
+            .withAction(AssetAction.ADOPTION).withAmount("0.00")
+            .when((AssetDTO assetDto) -> assetValidator.validate(assetDto))
+            .thenActualException().isEqualToComparingFieldByField(new BadRequestAlertException(
+            "Asset adoptions require a positive amount", "asset", "assetAdoptionsPositiveAmount"));
+    }
+
+    @Test
+    public void shouldRejectIfPaybackWithPositiveAmount() {
+        new GivenAssetValidationTestCase()
+            .withDocumentDate("2019-04-11").withValueDate("2019-04-12")
+            .withAction(AssetAction.PAYBACK).withAmount("64.00")
+            .when((AssetDTO assetDto) -> assetValidator.validate(assetDto))
+            .thenActualException().isEqualToComparingFieldByField(new BadRequestAlertException(
+            "Asset paybacks require a negative amount", "asset", "assetPaybacksNegativeAmount"));
+    }
+
+    @Test
+    public void shouldRejectIfPaybackWithZeroAmount() {
+        new GivenAssetValidationTestCase()
+            .withDocumentDate("2019-04-11").withValueDate("2019-04-12")
+            .withAction(AssetAction.PAYBACK).withAmount("0.00")
+            .when((AssetDTO assetDto) -> assetValidator.validate(assetDto))
+            .thenActualException().isEqualToComparingFieldByField(new BadRequestAlertException(
+            "Asset paybacks require a negative amount", "asset", "assetPaybacksNegativeAmount"));
+    }
+
+    @Test
+    public void shouldRejectIfHandoverWithPositiveAmount() {
+        new GivenAssetValidationTestCase()
+            .withDocumentDate("2019-04-11").withValueDate("2019-04-12")
+            .withAction(AssetAction.HANDOVER).withAmount("64.00")
+            .when((AssetDTO assetDto) -> assetValidator.validate(assetDto))
+            .thenActualException().isEqualToComparingFieldByField(new BadRequestAlertException(
+            "Asset handovers require a negative amount", "asset", "assetHandoversNegativeAmount"));
+    }
+
+    @Test
+    public void shouldRejectIfHandoverWithZeroAmount() {
+        new GivenAssetValidationTestCase()
+            .withDocumentDate("2019-04-11").withValueDate("2019-04-12")
+            .withAction(AssetAction.HANDOVER).withAmount("0.00")
+            .when((AssetDTO assetDto) -> assetValidator.validate(assetDto))
+            .thenActualException().isEqualToComparingFieldByField(new BadRequestAlertException(
+            "Asset handovers require a negative amount", "asset", "assetHandoversNegativeAmount"));
+    }
+
+    @Test
+    public void shouldRejectIfLossWithPositiveAmount() {
+        new GivenAssetValidationTestCase()
+            .withDocumentDate("2019-04-11").withValueDate("2019-04-12")
+            .withAction(AssetAction.LOSS).withAmount("64.00")
+            .when((AssetDTO assetDto) -> assetValidator.validate(assetDto))
+            .thenActualException().isEqualToComparingFieldByField(new BadRequestAlertException(
+            "Asset losses require a negative amount", "asset", "assetLossesNegativeAmount"));
+    }
+
+    @Test
+    public void shouldRejectIfLossWithZeroAmount() {
+        new GivenAssetValidationTestCase()
+            .withDocumentDate("2019-04-11").withValueDate("2019-04-12")
+            .withAction(AssetAction.LOSS).withAmount("0.00")
+            .when((AssetDTO assetDto) -> assetValidator.validate(assetDto))
+            .thenActualException().isEqualToComparingFieldByField(new BadRequestAlertException(
+            "Asset losses require a negative amount", "asset", "assetLossesNegativeAmount"));
+    }
+
+    @Test
+    public void shouldRejectIfClearingWithPositiveAmount() {
+        new GivenAssetValidationTestCase()
+            .withDocumentDate("2019-04-11").withValueDate("2019-04-12")
+            .withAction(AssetAction.CLEARING).withAmount("64.00")
+            .when((AssetDTO assetDto) -> assetValidator.validate(assetDto))
+            .thenActualException().isEqualToComparingFieldByField(new BadRequestAlertException(
+            "Asset clearings require a negative amount", "asset", "assetClearingsNegativeAmount"));
+    }
+
+    @Test
+    public void shouldRejectIfClearingWithZeroAmount() {
+        new GivenAssetValidationTestCase()
+            .withDocumentDate("2019-04-11").withValueDate("2019-04-12")
+            .withAction(AssetAction.CLEARING).withAmount("0.00")
+            .when((AssetDTO assetDto) -> assetValidator.validate(assetDto))
+            .thenActualException().isEqualToComparingFieldByField(new BadRequestAlertException(
+            "Asset clearings require a negative amount", "asset", "assetClearingsNegativeAmount"));
+    }
+
+
+    // -- only test fixture below ---
+
+    private class GivenAssetValidationTestCase {
+
+        private final AssetDTO assetDto = new AssetDTO();
+        private BadRequestAlertException actualException;
+
+        GivenAssetValidationTestCase withDocumentDate(String documentDate) {
+            assetDto.setDocumentDate(LocalDate.parse(documentDate));
+            return this;
+        }
+
+        GivenAssetValidationTestCase withValueDate(String valueDate) {
+            assetDto.setValueDate(LocalDate.parse(valueDate));
+            return this;
+        }
+
+        GivenAssetValidationTestCase withAction(AssetAction assetAction) {
+            assetDto.setAction(assetAction);
+            return this;
+        }
+
+        GivenAssetValidationTestCase withAmount(String amount) {
+            assetDto.setAmount(new BigDecimal(amount));
+            return this;
+        }
+
+        GivenAssetValidationTestCase  when(final Consumer<AssetDTO> statement) {
+            actualException = catchThrowableOfType(() -> assetValidator.validate(assetDto), BadRequestAlertException.class);
+            return this;
+        }
+
+        public AbstractThrowableAssert<?, ? extends Throwable> thenActualException() {
+            return assertThat(actualException);
+        }
+    }
+}

src/test/java/org/hostsharing/hsadminng/service/ShareValidatorUnitTest.java

@@ -0,0 +1,126 @@
+package org.hostsharing.hsadminng.service;
+
+import org.assertj.core.api.AbstractThrowableAssert;
+import org.hostsharing.hsadminng.domain.enumeration.ShareAction;
+import org.hostsharing.hsadminng.service.dto.ShareDTO;
+import org.hostsharing.hsadminng.web.rest.errors.BadRequestAlertException;
+import org.junit.Test;
+
+import java.time.LocalDate;
+import java.util.function.Consumer;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.catchThrowableOfType;
+
+public class ShareValidatorUnitTest {
+
+    private ShareValidator shareValidator = new ShareValidator();
+
+    @Test
+    public void shouldAcceptValidShareDTO() {
+        new GivenShareValidationTestCase()
+            .withDocumentDate("2019-04-11").withValueDate("2019-04-12")
+            .withAction(ShareAction.SUBSCRIPTION).withQuantity(1)
+            .when((ShareDTO shareDto) -> shareValidator.validate(shareDto))
+            .thenActualException().isNull();
+    }
+
+    @Test
+    public void shouldAcceptIfDocumentDateEqualsValueDate() {
+        new GivenShareValidationTestCase()
+            .withDocumentDate("2019-04-11").withValueDate("2019-04-11")
+            .withAction(ShareAction.SUBSCRIPTION).withQuantity(1)
+            .when((ShareDTO shareDto) -> shareValidator.validate(shareDto))
+            .thenActualException().isNull();
+    }
+
+    @Test
+    public void shouldRejectIfDocumentDateAfterValueDate() {
+        new GivenShareValidationTestCase()
+            .withDocumentDate("2019-04-13").withValueDate("2019-04-12")
+            .withAction(ShareAction.SUBSCRIPTION).withQuantity(1)
+            .when((ShareDTO shareDto) -> shareValidator.validate(shareDto))
+            .thenActualException().isEqualToComparingFieldByField(new BadRequestAlertException(
+            "Document date may not be after value date", "share", "documentDateMayNotBeAfterValueDate"));
+    }
+
+    @Test
+    public void shouldRejectIfSubscriptionWithNegativeQuantity() {
+        new GivenShareValidationTestCase()
+            .withDocumentDate("2019-04-11").withValueDate("2019-04-12")
+            .withAction(ShareAction.SUBSCRIPTION).withQuantity(-1)
+            .when((ShareDTO shareDto) -> shareValidator.validate(shareDto))
+            .thenActualException().isEqualToComparingFieldByField(new BadRequestAlertException(
+            "Share subscriptions require a positive quantity", "share", "shareSubscriptionPositiveQuantity"));
+    }
+
+    @Test
+    public void shouldRejectIfSubscriptionWithZeroQuantity() {
+        new GivenShareValidationTestCase()
+            .withDocumentDate("2019-04-11").withValueDate("2019-04-12")
+            .withAction(ShareAction.SUBSCRIPTION).withQuantity(0)
+            .when((ShareDTO shareDto) -> shareValidator.validate(shareDto))
+            .thenActualException().isEqualToComparingFieldByField(new BadRequestAlertException(
+            "Share subscriptions require a positive quantity", "share", "shareSubscriptionPositiveQuantity"));
+    }
+
+    @Test
+    public void shouldRejectIfCancellationWithPositiveQuantity() {
+        new GivenShareValidationTestCase()
+            .withDocumentDate("2019-04-11").withValueDate("2019-04-12")
+            .withAction(ShareAction.CANCELLATION).withQuantity(1)
+            .when((ShareDTO shareDto) -> shareValidator.validate(shareDto))
+            .thenActualException().isEqualToComparingFieldByField(new BadRequestAlertException(
+            "Share cancellations require a negative quantity", "share", "shareCancellationNegativeQuantity"));
+    }
+
+    @Test
+    public void shouldRejectIfCancellationWithZeroQuantity() {
+        new GivenShareValidationTestCase()
+            .withDocumentDate("2019-04-11").withValueDate("2019-04-12")
+            .withAction(ShareAction.CANCELLATION).withQuantity(0)
+            .when((ShareDTO shareDto) -> shareValidator.validate(shareDto))
+            .thenActualException().isEqualToComparingFieldByField(new BadRequestAlertException(
+            "Share cancellations require a negative quantity", "share", "shareCancellationNegativeQuantity"));
+    }
+
+
+    // -- only test fixture below ---
+
+    private class GivenShareValidationTestCase {
+
+        private final ShareDTO shareDto = new ShareDTO();
+        private BadRequestAlertException actualException;
+
+        GivenShareValidationTestCase withDocumentDate(String documentDate) {
+            shareDto.setDocumentDate(LocalDate.parse(documentDate));
+            return this;
+        }
+
+        GivenShareValidationTestCase withValueDate(String valueDate) {
+            shareDto.setValueDate(LocalDate.parse(valueDate));
+            return this;
+        }
+
+        GivenShareValidationTestCase withAction(ShareAction shareAction) {
+            shareDto.setAction(shareAction);
+            return this;
+        }
+
+        GivenShareValidationTestCase withQuantity(Integer quantity) {
+            shareDto.setQuantity(quantity);
+            return this;
+        }
+
+        GivenShareValidationTestCase  when(final Consumer<ShareDTO> statement) {
+            actualException = catchThrowableOfType(() -> shareValidator.validate(shareDto), BadRequestAlertException.class);
+            return this;
+        }
+
+        public AbstractThrowableAssert<?, ? extends Throwable> thenActualException() {
+            return assertThat(actualException);
+        }
+    }
+}
+
+