test: rewrite database tests (#393)

Author: Shinigami92

test/database.spec.ts

@@ -1,76 +1,98 @@
-import { describe, expect, it, vi } from 'vitest';
+import { afterEach, describe, expect, it } from 'vitest';
 import { faker } from '../src';
 
-describe('database', () => {
-  describe('column()', () => {
-    it('returns a column name', () => {
-      const spy_database_column = vi
-        .spyOn(faker.database, 'column')
-        .mockReturnValue('title');
-
-      const column = faker.database.column();
-      const expected = 'title';
-
-      expect(
-        column,
-        `The column name should be equals ${expected}. Current is ${column}`
-      ).toBe(expected);
-
-      spy_database_column.mockRestore();
-    });
-  });
-
-  describe('collation()', () => {
-    it('returns a collation', () => {
-      const spy_database_collation = vi
-        .spyOn(faker.database, 'collation')
-        .mockReturnValue('utf8_bin');
-
-      const collation = faker.database.collation();
-      const expected = 'utf8_bin';
+const seededRuns = [
+  {
+    seed: 42,
+    expectations: {
+      column: 'token',
+      type: 'smallint',
+      collation: 'utf8_bin',
+      engine: 'MEMORY',
+    },
+  },
+  {
+    seed: 1337,
+    expectations: {
+      column: 'email',
+      type: 'time',
+      collation: 'utf8_general_ci',
+      engine: 'MyISAM',
+    },
+  },
+  {
+    seed: 1211,
+    expectations: {
+      column: 'createdAt',
+      type: 'geometry',
+      collation: 'cp1250_general_ci',
+      engine: 'ARCHIVE',
+    },
+  },
+];
+
+const NON_SEEDED_BASED_RUN = 5;
+
+const functionNames = ['column', 'type', 'collation', 'engine'];
 
-      expect(
-        collation,
-        `The collation should be equals ${expected}. Current is ${collation}`
-      ).toBe(expected);
-
-      spy_database_collation.mockRestore();
-    });
-  });
-
-  describe('engine()', () => {
-    it('returns an engine', () => {
-      const spy_database_engine = vi
-        .spyOn(faker.database, 'engine')
-        .mockReturnValue('InnoDB');
-
-      const engine = faker.database.engine();
-      const expected = 'InnoDB';
-
-      expect(
-        engine,
-        `The db engine should be equals ${expected}. Current is ${engine}`
-      ).toBe(expected);
-
-      spy_database_engine.mockRestore();
-    });
+describe('database', () => {
+  afterEach(() => {
+    faker.locale = 'en';
   });
 
-  describe('type()', () => {
-    it('returns a column type', () => {
-      const spy_database_type = vi
-        .spyOn(faker.database, 'type')
-        .mockReturnValue('int');
-
-      const type = faker.database.type();
-      const expected = 'int';
-
-      expect(
-        type,
-        `The column type should be equals ${expected}. Current is ${type}`
-      ).toBe(expected);
+  for (const { seed, expectations } of seededRuns) {
+    describe(`seed: ${seed}`, () => {
+      for (const functionName of functionNames) {
+        it(`${functionName}()`, () => {
+          faker.seed(seed);
 
-      spy_database_type.mockRestore();
+          const actual = faker.database[functionName]();
+          expect(actual).toEqual(expectations[functionName]);
+        });
+      }
     });
+  }
+
+  // Create and log-back the seed for debug purposes
+  faker.seed(Math.ceil(Math.random() * 1_000_000_000));
+
+  describe(`random seeded tests for seed ${faker.seedValue}`, () => {
+    for (let i = 1; i <= NON_SEEDED_BASED_RUN; i++) {
+      describe('column()', () => {
+        it('should return a column name from array', () => {
+          const column = faker.database.column();
+          expect(column).toBeTruthy();
+          expect(typeof column).toBe('string');
+          expect(faker.definitions.database.column).toContain(column);
+        });
+      });
+
+      describe('collation()', () => {
+        it('should return a collation from array', () => {
+          const collation = faker.database.collation();
+          expect(collation).toBeTruthy();
+          expect(typeof collation).toBe('string');
+          expect(faker.definitions.database.collation).toContain(collation);
+        });
+      });
+
+      describe('engine()', () => {
+        it('should return an engine from array', () => {
+          const engine = faker.database.engine();
+          expect(engine).toBeTruthy();
+          expect(typeof engine).toBe('string');
+          expect(faker.definitions.database.engine).toContain(engine);
+        });
+      });
+
+      describe('type()', () => {
+        it('should return a column type from array', () => {
+          const type = faker.database.type();
+          expect(type).toBeTruthy();
+          expect(typeof type).toBe('string');
+          expect(faker.definitions.database.type).toContain(type);
+        });
+      });
+    }
   });
 });