add some tests, remove populator, and polish

Author: antkorwin

src/main/java/com/antkorwin/springtestmongo/MongoPopulator.java

@@ -19,7 +19,8 @@ public enum MongoDbErrorInfo implements ErrorInfo {
     UNRESOLVED_DOCUMENT_COLLECTION_CLASS_TYPE("Unresolved document collection class reference from the DataSet."),
     DOCUMENT_RECORD_PARSING_ERROR("Error while parsing the document record in the collection."),
     DATASET_PARSING_ERROR("Error while parsing the file with a dataset."),
-    DATASET_FORMAT_ERROR("Wrong dataset's format.");
+    DATASET_FORMAT_ERROR("Wrong dataset's format."),
+    JSON_PARSING_ERROR("Error when parsing the JSON text.");
 
     private final String message;
     private final int base = 1000;

src/main/java/com/antkorwin/springtestmongo/errorinfo/MongoDbErrorInfo.java

@@ -8,8 +8,8 @@
 import java.io.InputStream;
 import java.nio.charset.StandardCharsets;
 
+import static com.antkorwin.springtestmongo.errorinfo.MongoDbErrorInfo.FILE_NOT_FOUND;
 import static com.antkorwin.springtestmongo.errorinfo.MongoDbErrorInfo.READ_DATASETS_FILE_ERROR;
-import static sun.management.AgentConfigurationError.FILE_NOT_FOUND;
 
 /**
  * Load text from a file.
@@ -26,12 +26,10 @@ class ImportFile implements Text {
 
     @Override
     public String read() {
-
-        InputStream inputStream = getResourceStream();
-        Guard.check(inputStream != null, InternalException.class, FILE_NOT_FOUND);
-
-        try {
+        try (InputStream inputStream = getResourceStream()) {
+            Guard.check(inputStream != null, InternalException.class, FILE_NOT_FOUND);
             return IOUtils.toString(inputStream, StandardCharsets.UTF_8);
+
         } catch (IOException e) {
             e.printStackTrace();
             throw new InternalException(READ_DATASETS_FILE_ERROR, e);

src/main/java/com/antkorwin/springtestmongo/internal/ImportFile.java

@@ -9,6 +9,8 @@
 import java.util.List;
 import java.util.Map;
 
+import static com.antkorwin.springtestmongo.errorinfo.MongoDbErrorInfo.JSON_PARSING_ERROR;
+
 /**
  * Convert a {@link Text} (in JSON format) to the {@link DataSet}
  *
@@ -30,10 +32,11 @@ public Map<String, List<?>> read() {
 
         String content = text.read();
         try {
-            return objectMapper.readValue(content, new TypeReference<Map<String, List<?>>>() {});
+            return objectMapper.readValue(content, new TypeReference<Map<String, List<?>>>() {
+            });
         } catch (IOException e) {
             e.printStackTrace();
-            throw new InternalException(e);
+            throw new InternalException(JSON_PARSING_ERROR, e);
         }
     }
 }

src/main/java/com/antkorwin/springtestmongo/internal/JsonImport.java

@@ -1,7 +1,11 @@
 package com.antkorwin.springtestmongo.internal;
 
+import com.antkorwin.commonutils.exceptions.InternalException;
+import com.antkorwin.commonutils.validation.Guard;
 import org.springframework.data.mongodb.core.MongoTemplate;
 
+import static com.antkorwin.springtestmongo.errorinfo.MongoDbErrorInfo.MONGO_TEMPLATE_IS_MANDATORY;
+
 /**
  * MongoDb test tools,
  * to run importing and exporting MongoDb's data.
@@ -13,6 +17,7 @@ public class MongoDbTest {
     private final MongoTemplate mongoTemplate;
 
     public MongoDbTest(MongoTemplate mongoTemplate) {
+        Guard.check(mongoTemplate != null, InternalException.class, MONGO_TEMPLATE_IS_MANDATORY);
         this.mongoTemplate = mongoTemplate;
     }
 

src/main/java/com/antkorwin/springtestmongo/internal/MongoDbTest.java

@@ -2,7 +2,6 @@
 
 import com.antkorwin.commonutils.exceptions.InternalException;
 import com.antkorwin.commonutils.validation.Guard;
-import com.antkorwin.springtestmongo.MongoPopulator;
 import com.antkorwin.springtestmongo.annotation.ExportMongoDataSet;
 import com.antkorwin.springtestmongo.annotation.MongoDataSet;
 import com.antkorwin.springtestmongo.internal.MongoDbTest;

src/main/java/com/antkorwin/springtestmongo/junit4/MongoDbRule.java

@@ -2,7 +2,6 @@
 
 import com.antkorwin.commonutils.exceptions.InternalException;
 import com.antkorwin.commonutils.validation.Guard;
-import com.antkorwin.springtestmongo.MongoPopulator;
 import com.antkorwin.springtestmongo.annotation.ExportMongoDataSet;
 import com.antkorwin.springtestmongo.annotation.MongoDataSet;
 import com.antkorwin.springtestmongo.internal.MongoDbTest;