fix(cts): assert that exceptions are thrown

templates/java/tests/client/suite.mustache

@@ -77,7 +77,7 @@ class {{client}}ClientTests {
             assertEquals("{{{match}}}", result.host);
           {{/testHost}}
           {{#testResponse}}
-          assertDoesNotThrow(() -> JSONAssert.assertEquals("{{#lambda.escapeQuotes}}{{{match.parameters}}}{{/lambda.escapeQuotes}}", json.writeValueAsString(res), JSONCompareMode.STRICT));
+            assertDoesNotThrow(() -> JSONAssert.assertEquals("{{#lambda.escapeQuotes}}{{{match.parameters}}}{{/lambda.escapeQuotes}}", json.writeValueAsString(res), JSONCompareMode.STRICT));
           {{/testResponse}}
         {{/match}}
       {{/isError}}

templates/php/tests/client/suite.mustache

@@ -61,6 +61,7 @@ class {{clientPrefix}}Test extends TestCase implements HttpClientInterface
             {{#isError}}
               try {
                   {{#dynamicTemplate}}{{/dynamicTemplate}}
+                  $this->fail('Expected exception to be thrown');
               } catch (\Exception $e) {
                   $this->assertEquals($e->getMessage(), '{{{expectedError}}}');
               }

templates/python/tests/client/suite.mustache

@@ -29,6 +29,7 @@ class Test{{#lambda.pascalcase}}{{{client}}}{{/lambda.pascalcase}}:
         {{#isError}}
         try:
             {{#dynamicTemplate}}{{/dynamicTemplate}}
+            assert False
         except (ValueError, Exception) as e:
             assert str(e) == {{#lambda.codeSnakeCase}}"{{{expectedError}}}"{{/lambda.codeSnakeCase}}
         {{/isError}}

templates/ruby/tests/client/suite.mustache

@@ -19,6 +19,7 @@ class TestClient{{#lambda.pascalcase}}{{{client}}}{{/lambda.pascalcase}} < Test:
     {{#isError}}
     begin
       {{#dynamicTemplate}}{{/dynamicTemplate}}
+      assert(false, 'An error should have been raised')
     rescue => e
       assert_equal({{#lambda.codeSnakeCase}}'{{{expectedError}}}'{{/lambda.codeSnakeCase}}, e.message)
     end