1 files changed, 156 insertions, 0 deletions
diff --git a/test/conf/ConfLoaderTest.ts b/test/conf/ConfLoaderTest.ts
new file mode 100644
index 0000000..4d71301
--- /dev/null
+++ b/test/conf/ConfLoaderTest.ts
@@ -0,0 +1,156 @@
+/**
+ * Tests ConfLoader
+ *
+ *  Copyright (C) 2010-2019 R-T Specialty, LLC.
+ *
+ *  This file is part of the Liza Data Collection Framework.
+ *
+ *  liza is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+const chai   = require( 'chai' );
+const expect = chai.expect;
+
+import { readFile } from "fs";
+
+import { ConfLoader as Sut } from "../../src/conf/ConfLoader";
+
+type FsLike = { readFile: typeof readFile };
+
+const {
+    store: {
+        MemoryStore: Store,
+    },
+} = require( '../../' );
+
+chai.use( require( 'chai-as-promised' ) );
+
+
+describe( 'ConfLoader', () =>
+{
+    it( "loads Store'd configuration from file", () =>
+    {
+        const expected_path = "/foo/bar/baz.json";
+        const expected_data = '{ "foo": "bar" }';
+
+        const fs = <FsLike>{
+            readFile( path: string, encoding: string, callback: any )
+            {
+                expect( path ).to.equal( expected_path );
+                expect( encoding ).to.equal( 'utf8' );
+
+                callback( null, expected_data );
+            },
+        };
+
+        return expect(
+            new Sut( fs, Store )
+                .fromFile( expected_path )
+                .then( conf => conf.get( 'foo' ) )
+        ).to.eventually.deep.equal( JSON.parse( expected_data ).foo );
+    } );
+
+
+    it( "fails on read error", () =>
+    {
+        const expected_err = Error( 'rejected' );
+
+        const fs = <FsLike>{
+            readFile( _: any, __: any, callback: any )
+            {
+                callback( expected_err, null );
+            },
+        };
+
+        return expect( new Sut( fs, Store ).fromFile( '' ) )
+            .to.eventually.be.rejectedWith( expected_err );
+    } );
+
+
+    it( "can override #parseConfData for custom parser", () =>
+    {
+        const result = { foo: {} };
+        const input  = "foo";
+
+        const fs = <FsLike>{
+            readFile( _: any, __: any, callback: any )
+            {
+                callback( null, input );
+            },
+        };
+
+        const sut = new class extends Sut
+        {
+            parseConfData( given_input: string )
+            {
+                expect( given_input ).to.equal( input );
+                return Promise.resolve( result );
+            }
+        }( fs, Store );
+
+        return expect(
+            sut.fromFile( '' )
+                .then( conf => conf.get( 'foo' ) )
+        ).to.eventually.equal( result.foo );
+    } );
+
+
+    it( 'rejects promise on parsing error', () =>
+    {
+        const expected_err = SyntaxError( 'test parsing error' );
+
+        const fs = <FsLike>{
+            readFile( _: any, __: any, callback: any )
+            {
+                // make async so that we clear the stack, and therefore
+                // try/catch
+                process.nextTick( () => callback( null, '' ) );
+            },
+        };
+
+        const sut = new class extends Sut
+        {
+            parseConfData( _given_input: string ): never
+            {
+                throw expected_err;
+            }
+        }( fs, Store );
+
+        return expect( sut.fromFile( '' ) )
+            .to.eventually.be.rejectedWith( expected_err );
+    } );
+
+
+    it( "rejects promise on Store ctor error", () =>
+    {
+        const expected_err = Error( 'test Store ctor error' );
+
+        const fs = <FsLike>{
+            readFile: ( _: any, __: any, callback: any ) =>
+                callback( null, '' ),
+        };
+
+        const badstore = () => { throw expected_err };
+
+        return expect( new Sut( fs, badstore ).fromFile( '' ) )
+            .to.eventually.be.rejectedWith( expected_err );
+    } );
+
+
+    it( "rejects promise on bad fs call", () =>
+    {
+        return expect( new Sut( <FsLike>{}, Store ).fromFile( '' ) )
+            .to.eventually.be.rejected;
+    } );
+} );