From fd565949c17a160a1297838a7388fc6a7c9a954f Mon Sep 17 00:00:00 2001
From: Peter Sieg <chasingmaxwell@gmail.com>
Date: Sun, 15 Sep 2019 17:45:21 -0400
Subject: [PATCH] feat: expose propositions field which lists all propositions

---
 src/graphql/resolvers/index.test.ts           |  1 +
 src/graphql/resolvers/index.ts                |  2 +
 .../resolvers/listPropositions.test.ts        | 40 +++++++++++++++++++
 src/graphql/resolvers/listPropositions.ts     |  8 ++++
 src/graphql/typeDefs/Root.graphql             |  1 +
 .../typeDefs/__snapshots__/index.test.ts.snap |  1 +
 6 files changed, 53 insertions(+)
 create mode 100644 src/graphql/resolvers/listPropositions.test.ts
 create mode 100644 src/graphql/resolvers/listPropositions.ts

diff --git a/src/graphql/resolvers/index.test.ts b/src/graphql/resolvers/index.test.ts
index aec5738..19ac2c1 100644
--- a/src/graphql/resolvers/index.test.ts
+++ b/src/graphql/resolvers/index.test.ts
@@ -15,6 +15,7 @@ describe('resolvers', () => {
         },
         "Query": Object {
           "proposition": [Function],
+          "propositions": [Function],
         },
       }
     `);
diff --git a/src/graphql/resolvers/index.ts b/src/graphql/resolvers/index.ts
index 381cfde..720a896 100644
--- a/src/graphql/resolvers/index.ts
+++ b/src/graphql/resolvers/index.ts
@@ -1,5 +1,6 @@
 import createProposition from './createProposition';
 import proposition from './getProposition';
+import propositions from './listPropositions';
 import Proposition from './Proposition';
 import setSupportedBy from './setSupportedBy';
 import setSupports from './setSupports';
@@ -13,5 +14,6 @@ export default {
   Proposition,
   Query: {
     proposition,
+    propositions,
   },
 };
diff --git a/src/graphql/resolvers/listPropositions.test.ts b/src/graphql/resolvers/listPropositions.test.ts
new file mode 100644
index 0000000..63403b6
--- /dev/null
+++ b/src/graphql/resolvers/listPropositions.test.ts
@@ -0,0 +1,40 @@
+import {
+  IProposition,
+  listPropositions as _listPropositions,
+} from '../../lib/proposition';
+import listPropositions from './listPropositions';
+
+jest.mock('../../lib/proposition', () => ({
+  listPropositions: jest.fn(),
+}));
+
+const propositions = [
+  {
+    id: 0,
+    supportedBy: [1, 2],
+    supports: [],
+    text: 'Greeks are mortal',
+  },
+  {
+    id: 1,
+    supportedBy: [],
+    supports: [0],
+    text: 'All men are mortal',
+  },
+  {
+    id: 2,
+    supportedBy: [],
+    supports: [0],
+    text: 'Greeks are men',
+  },
+];
+
+(_listPropositions as jest.Mock<any>).mockImplementation(
+  async (): Promise<IProposition[]> => propositions
+);
+
+describe('Propositions', () => {
+  it('returns an array of propositions', async () => {
+    await expect(listPropositions()).resolves.toEqual(propositions);
+  });
+});
diff --git a/src/graphql/resolvers/listPropositions.ts b/src/graphql/resolvers/listPropositions.ts
new file mode 100644
index 0000000..5ccc27d
--- /dev/null
+++ b/src/graphql/resolvers/listPropositions.ts
@@ -0,0 +1,8 @@
+import { IProposition, listPropositions } from '../../lib/proposition';
+
+/**
+ * GraphQL resolver for the propositions field.
+ */
+export default async function propositions(): Promise<IProposition[]> {
+  return listPropositions();
+}
diff --git a/src/graphql/typeDefs/Root.graphql b/src/graphql/typeDefs/Root.graphql
index 35df845..ab5edfc 100644
--- a/src/graphql/typeDefs/Root.graphql
+++ b/src/graphql/typeDefs/Root.graphql
@@ -8,6 +8,7 @@ type Query {
   Get a proposition by its identifier.
   """
   proposition(id: Int!): Proposition
+  propositions: [Proposition]
 }
 
 type Mutation {
diff --git a/src/graphql/typeDefs/__snapshots__/index.test.ts.snap b/src/graphql/typeDefs/__snapshots__/index.test.ts.snap
index 1cd14a2..730c2bd 100644
--- a/src/graphql/typeDefs/__snapshots__/index.test.ts.snap
+++ b/src/graphql/typeDefs/__snapshots__/index.test.ts.snap
@@ -5,6 +5,7 @@ exports[`typeDefs exports the GraphQL schema 1`] = `
 type Query {
   \\"\\"\\"Get a proposition by its identifier.\\"\\"\\"
   proposition(id: Int!): Proposition
+  propositions: [Proposition]
 }
 
 type Mutation {