test: reorganize structure

JanMalch · Oct 22, 2020 · d8aa727 · d8aa727
1 parent 4a6b8f9
commit d8aa727
Showing 1 changed file with 32 additions and 32 deletions.
diff --git a/index.test.ts b/index.test.ts
@@ -47,6 +47,38 @@ describe('contracts', () => {
   contractTest(asserts, AssertionError, 'Failed Assertion');
 });
 
+describe('NonNullish contracts', () => {
+  const contractTest = (
+    contract: <T>(value: T, message?: string) => NonNullable<T>,
+    errorType: new (...args: any[]) => Error,
+    defaultMessage: string
+  ): void => {
+    describe(contract.name, () => {
+      it('should not error if the value is defined', () => {
+        expect(() => contract('A nice String')).not.toThrowError();
+      });
+      it('should throw an Error if the value is not defined', () => {
+        expect(() => contract(null)).toThrowError(
+          // eslint-disable-next-line new-cap
+          new errorType(defaultMessage)
+        );
+      });
+    });
+  };
+
+  contractTest(
+    requiresNonNullish,
+    PreconditionError,
+    'Value must be defined'
+  );
+  contractTest(
+    checksNonNullish,
+    IllegalStateError,
+    'Callee invariant violation'
+  );
+  contractTest(ensuresNonNullish, PostconditionError, 'Unmet postcondition');
+});
+
 describe('utils', () => {
   describe('error', () => {
     it('should always error', () => {
@@ -64,38 +96,6 @@ describe('utils', () => {
     });
   });
 
-  describe('NonNullish contract tests', () => {
-    const contractTest = (
-      contract: <T>(value: T, message?: string) => NonNullable<T>,
-      errorType: new (...args: any[]) => Error,
-      defaultMessage: string
-    ): void => {
-      describe(contract.name, () => {
-        it('should not error if the value is defined', () => {
-          expect(() => contract('A nice String')).not.toThrowError();
-        });
-        it('should throw an Error if the value is not defined', () => {
-          expect(() => contract(null)).toThrowError(
-            // eslint-disable-next-line new-cap
-            new errorType(defaultMessage)
-          );
-        });
-      });
-    };
-
-    contractTest(
-      requiresNonNullish,
-      PreconditionError,
-      'Value must be defined'
-    );
-    contractTest(
-      checksNonNullish,
-      IllegalStateError,
-      'Callee invariant violation'
-    );
-    contractTest(ensuresNonNullish, PostconditionError, 'Unmet postcondition');
-  });
-
   describe('isDefined', () => {
     it('should return true for defined values', () => {
       expect(isDefined('TypeScript')).toBe(true);