chore: add test for typescript gen tool (#4174)

backend/molgenis-emx2-run/src/main/java/org/molgenis/emx2/AToolToGenerateTypeScriptTypes.java

@@ -1,7 +1,5 @@
 package org.molgenis.emx2;
 
-import static java.lang.System.exit;
-
 import org.molgenis.emx2.sql.SqlDatabase;
 import org.molgenis.emx2.typescript.Generator;
 
@@ -22,7 +20,6 @@ public static void main(String[] args) {
     } else {
       System.out.println(
           "Missing required arguments ( SchemaName ( example: 'Pet Store'), full-file-path (example: '/home/bob/app/types.ts')");
-      exit(1);
     }
   }
 
@@ -33,7 +30,6 @@ public static void generate(String schemaName, String fileFullPath) {
     Schema schema = db.getSchema(schemaName);
     if (schema == null) {
       System.out.println("Schema " + schemaName + " not found");
-      exit(1);
     }
 
     Generator generator = new Generator();

backend/molgenis-emx2-run/src/test/java/org/molgenis/emx2/AToolToGenerateTypeScriptTypesTest.java

@@ -0,0 +1,80 @@
+package org.molgenis.emx2;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+import java.nio.charset.Charset;
+import org.junit.jupiter.api.Test;
+
+class AToolToGenerateTypeScriptTypesTest {
+
+  @Test
+  void runWithMissingArgs() {
+    PrintStream old = System.out;
+    ByteArrayOutputStream baos = new ByteArrayOutputStream();
+    PrintStream out = new PrintStream(baos);
+    System.setOut(out);
+
+    String[] args = new String[] {};
+    try {
+      AToolToGenerateTypeScriptTypes.main(args);
+    } catch (Exception e) {
+      e.printStackTrace();
+    }
+
+    System.out.flush();
+    System.setOut(old);
+    String s = new String(baos.toByteArray(), Charset.defaultCharset());
+    assertEquals(
+        "Generating TypeScript types\n"
+            + "Missing required arguments ( SchemaName ( example: 'Pet Store'), full-file-path (example: '/home/bob/app/types.ts')\n",
+        s);
+  }
+
+  @Test
+  void runWithSingleArg() {
+    PrintStream old = System.out;
+    ByteArrayOutputStream baos = new ByteArrayOutputStream();
+    PrintStream out = new PrintStream(baos);
+    System.setOut(out);
+
+    String[] args = new String[] {"pet store"};
+    try {
+      AToolToGenerateTypeScriptTypes.main(args);
+    } catch (Exception e) {
+      e.printStackTrace();
+    }
+
+    System.out.flush();
+    System.setOut(old);
+    String s = new String(baos.toByteArray(), Charset.defaultCharset());
+    assertEquals(
+        "Generating TypeScript types\n"
+            + "Missing required arguments ( SchemaName ( example: 'Pet Store'), full-file-path (example: '/home/bob/app/types.ts')\n",
+        s);
+  }
+
+  @Test
+  void runWithValidArgs() {
+    PrintStream old = System.out;
+    ByteArrayOutputStream baos = new ByteArrayOutputStream();
+    PrintStream out = new PrintStream(baos);
+    System.setOut(out);
+
+    String[] args = new String[] {"pet store", "'/home/bob/app/types.ts"};
+    try {
+      AToolToGenerateTypeScriptTypes.main(args);
+    } catch (Exception e) {
+      System.out.flush();
+      System.setOut(old);
+      String s = new String(baos.toByteArray(), Charset.defaultCharset());
+
+      assertTrue(
+          s.contains(
+              "Generating TypeScript types\n"
+                  + "  Generate from Schema: pet store\n"
+                  + "  Generate into file: '/home/bob/app/types.ts"));
+    }
+  }
+}