Merge pull request #55 from Srokap/more_assertions

More assertions

Author: jakewmeyer

routes/v1-launches.js

@@ -2,6 +2,7 @@
 
 const express = require("express")
 const v1 = express.Router()
+const error = {error: "No results found"}
 
 // Get most recent launch
 v1.get("/latest", (req, res, next) => {
@@ -10,7 +11,11 @@ v1.get("/latest", (req, res, next) => {
       if (err) {
         return next(err)
       }
-      res.json(doc)
+      if (doc.length == 0) {
+        res.status(404)
+        return res.json(error)
+      }
+      res.json(doc[0])
     })
 })
 

test/utilities/custom-asymmetric-matchers.js

@@ -0,0 +1,103 @@
+/**
+ * We make ourselves compatible with AsymmetricMatcher class used by Jest
+ * @see https://github.com/facebook/jest/blob/master/packages/expect/src/asymmetric_matchers.js
+ *
+ * Perhaps we can simplify that a bit and write only Jasmine-compatible matchers.
+ * @see https://jasmine.github.io/2.4/introduction.html#section-Custom_asymmetric_equality_tester
+ */
+class CustomAsymmetricMatcher {
+  constructor() {
+    // $$typeof is used internally by Jest and just to be sure let's use jest Symbol
+    this.$$typeof = Symbol.for("jest.asymmetricMatcher")
+  }
+}
+
+/**
+ * Expect metric and imperial volume numbers in object.
+ */
+class SpacexVolume extends CustomAsymmetricMatcher {
+  asymmetricMatch(any) {
+    expect(any).toEqual(expect.anything())
+    expect(any).toHaveProperty("cubic_meters", expect.any(Number))
+    expect(any).toHaveProperty("cubic_feet", expect.any(Number))
+    expect(any.cubic_meters).toBeGreaterThanOrEqual(0)
+    expect(any.cubic_feet).toBeGreaterThanOrEqual(0)
+    return true
+  }
+
+  toString() {
+    return "SpacexVolume"
+  }
+
+  getExpectedType() {
+    return "object"
+  }
+
+  toAsymmetricMatcher() {
+    return "SpacexVolume"
+  }
+}
+
+/**
+ * Expect metric and imperial length (or dimension) numbers in object.
+ */
+class SpacexLength extends CustomAsymmetricMatcher {
+  asymmetricMatch(any) {
+    expect(any).toEqual(expect.anything())
+    expect(any).toHaveProperty("meters", expect.any(Number))
+    expect(any).toHaveProperty("feet", expect.any(Number))
+    expect(any.meters).toBeGreaterThanOrEqual(0)
+    expect(any.feet).toBeGreaterThanOrEqual(0)
+    return true
+  }
+
+  toString() {
+    return "SpacexLength"
+  }
+
+  getExpectedType() {
+    return "object"
+  }
+
+  toAsymmetricMatcher() {
+    return "SpacexLength"
+  }
+}
+
+/**
+ * Expect metric and imperial mass numbers in object.
+ */
+class SpacexMass extends CustomAsymmetricMatcher {
+  asymmetricMatch(any) {
+    expect(any).toEqual(expect.anything())
+    expect(any).toHaveProperty("kg", expect.any(Number))
+    expect(any).toHaveProperty("lb", expect.any(Number))
+    expect(any.kg).toBeGreaterThanOrEqual(0)
+    expect(any.lb).toBeGreaterThanOrEqual(0)
+    return true
+  }
+
+  toString() {
+    return "SpacexMass"
+  }
+
+  getExpectedType() {
+    return "object"
+  }
+
+  toAsymmetricMatcher() {
+    return "SpacexMass"
+  }
+}
+
+module.exports = {
+  volume: () => {
+    return new SpacexVolume()
+  },
+  length: () => {
+    return new SpacexLength()
+  },
+  mass: () => {
+    return new SpacexMass()
+  }
+}