Fix CQM Major defects in Backend (Samsung#1607)

This commit fixes 4 major defects in modules in Backend directory.
It fixes by refering unused objects.

ONE-vscode-DCO-1.0-Signed-off-by: Dayoung Lee <dayoung.lee@samsung.com>

src/Tests/Backend/Compiler.test.ts

@@ -20,11 +20,9 @@ import { CompilerBase } from "../../Backend/Compiler";
 suite("Backend", function () {
   suite("CompilerBase", function () {
     suite("#constructor()", function () {
-      test("Create dummy compiler", function (pass) {
-        new CompilerBase();
-
-        pass();
-        assert.ok(true);
+      test("Create dummy compiler", function () {
+        const instance = new CompilerBase();
+        assert.isTrue(instance instanceof CompilerBase);
       });
     });
 

src/Tests/Backend/Executor.test.ts

@@ -20,11 +20,9 @@ import { ExecutorBase } from "../../Backend/Executor";
 suite("Backend", function () {
   suite("ExecutorBase", function () {
     suite("#constructor()", function () {
-      test("Create dummy executor", function (pass) {
-        new ExecutorBase();
-
-        pass();
-        assert.ok(true);
+      test("Create dummy executor", function () {
+        const instance = new ExecutorBase();
+        assert.isTrue(instance instanceof ExecutorBase);
       });
     });
 

src/Tests/Backend/Toolchain.test.ts

@@ -21,11 +21,9 @@ suite("Backend", function () {
   suite("ToolCommand", function () {
     const toolchainInfo = new ToolchainInfo("dummy", "dummy toolchain");
     suite("#constructor()", function () {
-      test("Create dummy tool command", function (pass) {
-        new ToolCommand(toolchainInfo);
-
-        pass();
-        assert.ok(true);
+      test("Create dummy tool command", function () {
+        const instance = new ToolCommand(toolchainInfo);
+        assert.isTrue(instance instanceof ToolCommand);
       });
     });
 
@@ -54,11 +52,9 @@ suite("Backend", function () {
     const toolchainInfo = new ToolchainInfo("dummy", "dummy toolchain");
 
     suite("#constructor()", function () {
-      test("Create dummy toolchain", function (pass) {
-        new Toolchain(toolchainInfo);
-
-        pass();
-        assert.ok(true);
+      test("Create dummy toolchain", function () {
+        const instance = new Toolchain(toolchainInfo);
+        assert.isTrue(instance instanceof Toolchain);
       });
     });