Improve coverage

jest.config.js

@@ -32,10 +32,10 @@ module.exports = {
   coverageReporters: [`json-summary`, `text`, `html`],
   coverageThreshold: {
     global: {
-      lines: 42,
-      statements: 43,
-      functions: 40,
-      branches: 42,
+      lines: 45,
+      statements: 44,
+      functions: 42,
+      branches: 43,
     },
   },
   collectCoverageFrom: coverageDirs,

packages/gatsby-plugin-feed/src/__tests__/__snapshots__/gatsby-node.js.snap

@@ -0,0 +1,84 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Test plugin feed custom query runs 1`] = `
+[MockFunction] {
+  "calls": Array [
+    Array [
+      "public/rss_new.xml",
+      "<?xml version=\\"1.0\\" encoding=\\"UTF-8\\"?><rss xmlns:dc=\\"http://purl.org/dc/elements/1.1/\\" xmlns:content=\\"http://purl.org/rss/1.0/modules/content/\\" xmlns:atom=\\"http://www.w3.org/2005/Atom\\" version=\\"2.0\\"><channel><title><![CDATA[a sample title]]></title><description><![CDATA[a description]]></description><link>http://github.com/dylang/node-rss</link><generator>RSS for Node</generator><lastBuildDate>Mon, 01 Jan 2018 00:00:00 GMT</lastBuildDate><item><title><![CDATA[No title]]></title><description><![CDATA[post description]]></description><link>http://dummy.url/a-custom-path</link><guid isPermaLink=\\"true\\">http://dummy.url/a-custom-path</guid></item><item><title><![CDATA[No title]]></title><description><![CDATA[post description]]></description><link>http://dummy.url/another-custom-path</link><guid isPermaLink=\\"true\\">http://dummy.url/another-custom-path</guid></item></channel></rss>",
+    ],
+  ],
+  "results": Array [
+    Object {
+      "isThrow": false,
+      "value": Promise {},
+    },
+  ],
+}
+`;
+
+exports[`Test plugin feed custom query runs 2`] = `
+[MockFunction] {
+  "calls": Array [
+    Array [
+      "
+    {
+      site {
+        siteMetadata {
+          title
+          description
+          siteUrl
+          site_url: siteUrl
+        }
+      }
+    }
+  ",
+    ],
+    Array [
+      "
+          {
+            allMarkdownRemark(
+              limit: 1000,
+            ) {
+              edges {
+                node {
+                  frontmatter {
+                    path
+                  }
+                  excerpt
+                }
+              }
+            }
+          }
+        ",
+    ],
+  ],
+  "results": Array [
+    Object {
+      "isThrow": false,
+      "value": Promise {},
+    },
+    Object {
+      "isThrow": false,
+      "value": Promise {},
+    },
+  ],
+}
+`;
+
+exports[`Test plugin feed default settings work properly 1`] = `
+[MockFunction] {
+  "calls": Array [
+    Array [
+      "public/rss.xml",
+      "<?xml version=\\"1.0\\" encoding=\\"UTF-8\\"?><rss xmlns:dc=\\"http://purl.org/dc/elements/1.1/\\" xmlns:content=\\"http://purl.org/rss/1.0/modules/content/\\" xmlns:atom=\\"http://www.w3.org/2005/Atom\\" version=\\"2.0\\"><channel><title><![CDATA[a sample title]]></title><description><![CDATA[a description]]></description><link>http://github.com/dylang/node-rss</link><generator>RSS for Node</generator><lastBuildDate>Mon, 01 Jan 2018 00:00:00 GMT</lastBuildDate><item><title><![CDATA[No title]]></title><description><![CDATA[post description]]></description><link>http://dummy.url/a-slug</link><guid isPermaLink=\\"false\\">http://dummy.url/a-slug</guid><content:encoded></content:encoded></item></channel></rss>",
+    ],
+  ],
+  "results": Array [
+    Object {
+      "isThrow": false,
+      "value": Promise {},
+    },
+  ],
+}
+`;

packages/gatsby-plugin-feed/src/__tests__/gatsby-node.js

@@ -0,0 +1,110 @@
+const fs = require(`fs`)
+const { onPostBuild } = require(`../gatsby-node`)
+const internals = require(`../internals`)
+jest.mock(`fs`)
+const DATE_TO_USE = new Date(`2018`)
+const _Date = Date
+global.Date = jest.fn(() => DATE_TO_USE)
+global.Date.UTC = _Date.UTC
+global.Date.now = _Date.now
+
+
+describe(`Test plugin feed`, async () => {
+  fs.existsSync = jest.fn()
+  fs.existsSync.mockReturnValue(true)
+
+  it(`default settings work properly`, async () => {
+    internals.writeFile = jest.fn()
+    internals.writeFile.mockResolvedValue(true)
+    const graphql = jest.fn()
+    graphql.mockResolvedValue({ data: {
+      site : {
+        siteMetadata: {
+          title: `a sample title`,
+          description: `a description`,
+          siteUrl: `http://dummy.url/`,
+        },
+      },
+      allMarkdownRemark: {
+        edges: [
+          { node: {
+            fields: {
+              slug: `a-slug`,
+            },
+            excerpt: `post description`,
+          } },
+        ],
+      },
+    } })
+    await onPostBuild({ graphql }, {})
+    expect(internals.writeFile).toMatchSnapshot()
+  })
+
+  it(`custom query runs`, async () => {
+    internals.writeFile = jest.fn()
+    internals.writeFile.mockResolvedValue(true)
+    const graphql = jest.fn()
+    graphql.mockResolvedValue({ data: {
+      site : {
+        siteMetadata: {
+          title: `a sample title`,
+          description: `a description`,
+          siteUrl: `http://dummy.url/`,
+        },
+      },
+      allMarkdownRemark: {
+        edges: [
+          {
+            node: {
+              frontmatter: {
+                path: `a-custom-path`,
+              },
+              excerpt: `post description`,
+            },
+          },
+          {
+            node: {
+              frontmatter: {
+                path: `another-custom-path`,
+              },
+              excerpt: `post description`,
+            },
+          },
+        ],
+      },
+    } })
+    const options = {
+      feeds: [
+        {
+          output: `rss_new.xml`,
+          serialize: ({ query: { site, allMarkdownRemark } }) =>
+            allMarkdownRemark.edges.map(edge => {
+              return {
+                ...edge.node.frontmatter,
+                description: edge.node.excerpt,
+                url: site.siteMetadata.siteUrl + edge.node.frontmatter.path,
+              }
+          }),
+          query: `
+          {
+            allMarkdownRemark(
+              limit: 1000,
+            ) {
+              edges {
+                node {
+                  frontmatter {
+                    path
+                  }
+                  excerpt
+                }
+              }
+            }
+          }
+        `,
+      }],
+    }
+    await onPostBuild({ graphql }, options)
+    expect(internals.writeFile).toMatchSnapshot()
+    expect(graphql).toMatchSnapshot()
+  })
+})

packages/gatsby-plugin-feed/src/gatsby-node.js

@@ -31,9 +31,7 @@ exports.onPostBuild = async ({ graphql }, pluginOptions) => {
     ...pluginOptions,
   }
 
-  if (`query` in options) {
-    options.query = await runQuery(graphql, options.query)
-  }
+  options.query = await runQuery(graphql, options.query)
 
   for (let f of options.feeds) {
     if (f.query) {

packages/gatsby-plugin-remove-trailing-slashes/src/__tests__/gatsby-node.js

@@ -0,0 +1,20 @@
+const { onCreatePage } = require(`../gatsby-node`)
+
+describe(`gatsby-plugin-remove-trailing-slashes`, () => {
+  const actions = {
+    createPage: jest.fn(),
+    deletePage: jest.fn(),
+  }
+
+  it(`correctly keeps index /`, () => {
+    onCreatePage({ actions, page: { page: `/` } })
+    expect(actions.createPage).not.toBeCalled()
+    expect(actions.deletePage).not.toBeCalled()
+  })
+
+  it(`correctly removes slash and recreated page`, () => {
+    onCreatePage({ actions, page: { path: `/home/` } })
+    expect(actions.deletePage).toBeCalledWith({ path: `/home/` })
+    expect(actions.createPage).toBeCalledWith({ path: `/home` })
+  })
+})

packages/gatsby/src/utils/__tests__/__snapshots__/get-hash-fn.js.snap

@@ -0,0 +1,5 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Test hashing function default parameters 1`] = `174577032270956`;
+
+exports[`Test hashing function guards against collisions 1`] = `[Error: Hash collision at f(my input) = 174577032270956]`;

packages/gatsby/src/utils/__tests__/get-hash-fn.js

@@ -0,0 +1,16 @@
+const getHashFn = require(`../get-hash-fn`)
+
+describe(`Test hashing function`, () => {
+  it(`default parameters`, () => {
+    const hash = getHashFn({})(`my input`)
+    expect(hash).toMatchSnapshot()
+  })
+  it(`guards against collisions`, () => {
+    const hash = getHashFn({})(`my input`)
+    try {
+      getHashFn({ cache: new Set([hash]) })(`my input`)
+    } catch(err) {
+      expect(err).toMatchSnapshot()
+    }
+  })
+})