Add exists functions

src/integration-test/kotlin/postgresql/DeleteIT.kt

@@ -4,6 +4,9 @@ import org.junit.jupiter.api.DisplayName
 import solutions.bitbadger.documents.common.Delete
 import kotlin.test.Test
 
+/**
+ * PostgreSQL integration tests for the `Delete` object / `deleteBy*` connection extension functions
+ */
 @DisplayName("PostgreSQL - Delete")
 class DeleteIT {
 

src/integration-test/kotlin/postgresql/ExistsIT.kt

@@ -0,0 +1,52 @@
+package solutions.bitbadger.documents.postgresql
+
+import org.junit.jupiter.api.DisplayName
+import solutions.bitbadger.documents.common.Exists
+import kotlin.test.Test
+
+/**
+ * PostgreSQL integration tests for the `Exists` object / `existsBy*` connection extension functions
+ */
+@DisplayName("PostgreSQL - Exists")
+class ExistsIT {
+
+    @Test
+    @DisplayName("byId returns true when a document matches the ID")
+    fun byIdMatch() =
+        PgDB().use(Exists::byIdMatch)
+
+    @Test
+    @DisplayName("byId returns false when no document matches the ID")
+    fun byIdNoMatch() =
+        PgDB().use(Exists::byIdNoMatch)
+
+    @Test
+    @DisplayName("byFields returns true when documents match")
+    fun byFieldsMatch() =
+        PgDB().use(Exists::byFieldsMatch)
+
+    @Test
+    @DisplayName("byFields returns false when no documents match")
+    fun byFieldsNoMatch() =
+        PgDB().use(Exists::byFieldsNoMatch)
+
+    @Test
+    @DisplayName("byContains returns true when documents match")
+    fun byContainsMatch() =
+        PgDB().use(Exists::byContainsMatch)
+
+    @Test
+    @DisplayName("byContains returns false when no documents match")
+    fun byContainsNoMatch() =
+        PgDB().use(Exists::byContainsNoMatch)
+
+    @Test
+    @DisplayName("byJsonPath returns true when documents match")
+    fun byJsonPathMatch() =
+        PgDB().use(Exists::byJsonPathMatch)
+
+    @Test
+    @DisplayName("byJsonPath returns false when no documents match")
+    fun byJsonPathNoMatch() =
+        PgDB().use(Exists::byJsonPathNoMatch)
+}