test(isValid2DCoordinate): add robust snapshot tests

Adds extensive snapshot testing to address #32.

tests/coordinates/__snapshots__/isValid2DCoordinate.test.js.snap

@@ -1,18 +1,42 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`Error Snapshot Testing. Throws error: expect([0, 0]).not.isValid3DCoordinate 1`] = `
-"[2mexpect([22m[31m[longitude, latitude][39m[2m).not.isValid2DCoordinate()[22m
+exports[`Error Snapshot Testing. Throws error: Coordinate latitude must be a number between -90 and 90 1`] = `
+"[2mexpect([22m[31m[longitude, latitude][39m[2m).isValid2DCoordinate()[22m
 
-Expected input to not be a two element array with longitude between (-90 to 90),
-        and latitude between (-180 to 180).
+Coordinate latitude must be a number between -90 and 90.
 
-Received:  [0, 0]"
+Received:  [0, 100]"
+`;
+
+exports[`Error Snapshot Testing. Throws error: Coordinate longitude must be a number between -180 and 180 1`] = `
+"expect([longitude, latitude]).isValid2DCoordinate()
+
+Coordinate longitude must be a number between -180 and 180.
+
+Received:  [-256, 0]"
+`;
+
+exports[`Error Snapshot Testing. Throws error: Coordinate must be an array of only two elments 1`] = `
+"expect([longitude, latitude]).isValid2DCoordinate()
+
+Coordinate must be an array of only two elments.
+
+Received:  [0, 0, 733]"
 `;
 
-exports[`Error Snapshot Testing. Throws error: expect(false).isValid2DCoordinate() 1`] = `
+exports[`Error Snapshot Testing. Throws error: Invalid input to matcher 1`] = `
 "expect([longitude, latitude]).isValid2DCoordinate()
 
 Coordinate must be an array of only two elments.
 
 Received:  false"
 `;
+
+exports[`Error Snapshot Testing. Throws error: Valid use case passes 1`] = `
+"expect([longitude, latitude]).not.isValid2DCoordinate()
+
+Expected input to not be a two element array with longitude between (-90 to 90),
+        and latitude between (-180 to 180).
+
+Received:  [0, 0]"
+`;

tests/coordinates/isValid2DCoordinate.test.js

@@ -122,11 +122,23 @@ describe('Inalid Use Cases', () => {
 })
 
 describe('Error Snapshot Testing. Throws error:', () => {
-    test('expect([0, 0]).not.isValid3DCoordinate', () => {
+    test('Valid use case passes', () => {
         expect(() => expect([0, 0]).not.isValid2DCoordinate()).toThrowErrorMatchingSnapshot()
     })
 
-    test('expect(false).isValid2DCoordinate()', () => {
+    test('Invalid input to matcher', () => {
         expect(() => expect(false).isValid2DCoordinate()).toThrowErrorMatchingSnapshot()
     })
+
+    test('Coordinate must be an array of only two elments', () => {
+        expect(() => expect([0, 0, 733]).isValid2DCoordinate()).toThrowErrorMatchingSnapshot()
+    })
+
+    test('Coordinate longitude must be a number between -180 and 180', () => {
+        expect(() => expect([-256, 0]).isValid2DCoordinate()).toThrowErrorMatchingSnapshot()
+    })
+
+    test('Coordinate latitude must be a number between -90 and 90', () => {
+        expect(() => expect([0, 100]).isValid2DCoordinate()).toThrowErrorMatchingSnapshot()
+    })
 })