Code coverage for JsonMappingConfigSupplier

Author: kobylynskyi

src/test/java/com/kobylynskyi/graphql/codegen/supplier/JsonMappingConfigSupplierTest.java

@@ -0,0 +1,29 @@
+package com.kobylynskyi.graphql.codegen.supplier;
+
+import com.kobylynskyi.graphql.codegen.model.MappingConfig;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class JsonMappingConfigSupplierTest {
+
+    @Test
+    void loadCorrect() {
+        MappingConfig externalMappingConfig = new JsonMappingConfigSupplier("src/test/resources/json/mappingconfig.json").get();
+        assertEquals(externalMappingConfig.getPackageName(), "com.kobylynskyi.graphql.testconfigjson");
+        assertEquals(externalMappingConfig.getGenerateApis(), true);
+        assertEquals(externalMappingConfig.getCustomTypesMapping().get("Price.amount"), "java.math.BigDecimal");
+        assertNull(externalMappingConfig.getApiPackageName());
+    }
+
+    @Test
+    void loadNull() {
+        assertNull(new JsonMappingConfigSupplier(null).get());
+    }
+
+    @Test
+    void loadInvalid() {
+        assertThrows(IllegalArgumentException.class, () -> new JsonMappingConfigSupplier("blah.json").get());
+    }
+
+}