test for FhirParseService

service/src/test/java/uk/nhs/adaptors/gp2gp/common/service/FhirParseServiceTest.java

@@ -0,0 +1,37 @@
+package uk.nhs.adaptors.gp2gp.common.service;
+
+import ca.uhn.fhir.context.FhirContext;
+import ca.uhn.fhir.parser.IParser;
+import ca.uhn.fhir.parser.StrictErrorHandler;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+class FhirParseServiceTest {
+
+    private ArgumentCaptor<StrictErrorHandler> captor = ArgumentCaptor.forClass(StrictErrorHandler.class);
+
+    @Test
+    void fhirParseServiceInitializedWithStrictErrorHandlerAndNewJsonParserTest() {
+
+        FhirContext fhirContext = mock(FhirContext.class);
+        IParser parser = mock(IParser.class);
+        when(fhirContext.newJsonParser()).thenReturn(parser);
+
+        FhirParseService service = new FhirParseService(fhirContext);
+
+        verify(fhirContext).setParserErrorHandler(captor.capture());
+        StrictErrorHandler strictErrorHandler = captor.getValue();
+        assertNotNull(strictErrorHandler, "StrictErrorHandler should not be null");
+        verify(fhirContext, times(2)).newJsonParser();
+    }
+}