chore: add test cases

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: na
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: passed
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: na
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: na
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---

Author: ShabiShett07

lib/node_modules/@stdlib/blas/base/dger/test/fixtures/column_major.json

@@ -6,7 +6,7 @@
   "x": [ 1.0, 1.0 ],
   "strideX": 1,
   "offsetX": 0,
-  "y": [ 0.0, 0.0, 0.0 ],
+  "y": [ 1.0, 1.0, 1.0 ],
   "strideY": 1,
   "offsetY": 0,
   "A": [ 1.0, 4.0, 2.0, 5.0, 3.0, 6.0 ],
@@ -18,5 +18,5 @@
   "strideA1": 1,
   "strideA2": 2,
   "offsetA": 0,
-  "A_out": [ 1.0, 4.0, 2.0, 5.0, 3.0, 6.0 ]
+  "A_out": [ 2.0, 5.0, 3.0, 6.0, 4.0, 7.0 ]
 }

lib/node_modules/@stdlib/blas/base/dger/test/fixtures/column_major_x_zeros.json

@@ -0,0 +1,22 @@
+{
+  "order": "column-major",
+  "M": 2,
+  "N": 3,
+  "alpha": 1.0,
+  "x": [ 0.0, 0.0 ],
+  "strideX": 1,
+  "offsetX": 0,
+  "y": [ 1.0, 1.0, 1.0 ],
+  "strideY": 1,
+  "offsetY": 0,
+  "A": [ 1.0, 4.0, 2.0, 5.0, 3.0, 6.0 ],
+  "A_mat": [
+    [ 1.0, 2.0, 3.0 ],
+    [ 4.0, 5.0, 6.0 ]
+  ],
+  "lda": 2,
+  "strideA1": 1,
+  "strideA2": 2,
+  "offsetA": 0,
+  "A_out": [ 1.0, 4.0, 2.0, 5.0, 3.0, 6.0 ]
+}

lib/node_modules/@stdlib/blas/base/dger/test/fixtures/column_major_y_zeros.json

@@ -0,0 +1,22 @@
+{
+  "order": "column-major",
+  "M": 2,
+  "N": 3,
+  "alpha": 1.0,
+  "x": [ 1.0, 1.0 ],
+  "strideX": 1,
+  "offsetX": 0,
+  "y": [ 0.0, 0.0, 0.0 ],
+  "strideY": 1,
+  "offsetY": 0,
+  "A": [ 1.0, 4.0, 2.0, 5.0, 3.0, 6.0 ],
+  "A_mat": [
+    [ 1.0, 2.0, 3.0 ],
+    [ 4.0, 5.0, 6.0 ]
+  ],
+  "lda": 2,
+  "strideA1": 1,
+  "strideA2": 2,
+  "offsetA": 0,
+  "A_out": [ 1.0, 4.0, 2.0, 5.0, 3.0, 6.0 ]
+}

lib/node_modules/@stdlib/blas/base/dger/test/fixtures/row_major_x_zeros.json

@@ -0,0 +1,22 @@
+{
+  "order": "row-major",
+  "M": 2,
+  "N": 3,
+  "alpha": 1.0,
+  "x": [ 0.0, 0.0 ],
+  "strideX": 1,
+  "offsetX": 0,
+  "y": [ 1.0, 1.0, 1.0 ],
+  "strideY": 1,
+  "offsetY": 0,
+  "A": [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ],
+  "A_mat": [
+    [ 1.0, 2.0, 3.0 ],
+    [ 4.0, 5.0, 6.0 ]
+  ],
+  "lda": 3,
+  "strideA1": 3,
+  "strideA2": 1,
+  "offsetA": 0,
+  "A_out": [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ]
+}

lib/node_modules/@stdlib/blas/base/dger/test/fixtures/row_major_y_zeros.json

@@ -0,0 +1,22 @@
+{
+  "order": "row-major",
+  "M": 2,
+  "N": 3,
+  "alpha": 1.0,
+  "x": [ 1.0, 1.0 ],
+  "strideX": 1,
+  "offsetX": 0,
+  "y": [ 0.0, 0.0, 0.0 ],
+  "strideY": 1,
+  "offsetY": 0,
+  "A": [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ],
+  "A_mat": [
+    [ 1.0, 2.0, 3.0 ],
+    [ 4.0, 5.0, 6.0 ]
+  ],
+  "lda": 3,
+  "strideA1": 3,
+  "strideA2": 1,
+  "offsetA": 0,
+  "A_out": [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ]
+}

lib/node_modules/@stdlib/blas/base/dger/test/test.dger.js

@@ -34,12 +34,16 @@ var cxpyp = require( './fixtures/column_major_xpyp.json' );
 var cxnyp = require( './fixtures/column_major_xnyp.json' );
 var cxpyn = require( './fixtures/column_major_xpyn.json' );
 var cxnyn = require( './fixtures/column_major_xnyn.json' );
+var cx0 = require( './fixtures/column_major_x_zeros.json' );
+var cy0 = require( './fixtures/column_major_y_zeros.json' );
 
 var rm = require( './fixtures/row_major.json' );
 var rxpyp = require( './fixtures/row_major_xpyp.json' );
 var rxnyp = require( './fixtures/row_major_xnyp.json' );
 var rxpyn = require( './fixtures/row_major_xpyn.json' );
 var rxnyn = require( './fixtures/row_major_xnyn.json' );
+var rx0 = require( './fixtures/row_major_x_zeros.json' );
+var ry0 = require( './fixtures/row_major_y_zeros.json' );
 
 
 // TESTS //
@@ -472,7 +476,95 @@ tape( 'the function supports specifying a negative `x` stride (column-major)', f
 	t.end();
 });
 
-tape( 'the function supports specifying a negative `y` stride (row-major)', function test( t ) {
+tape( 'the function returns the input matrix unchanged if input `x` filled with zeroes (row-major)', function test( t ) {
+	var expected;
+	var data;
+	var out;
+	var a;
+	var x;
+	var y;
+
+	data = rx0;
+
+	a = new Float64Array( data.A );
+	x = new Float64Array( data.x );
+	y = new Float64Array( data.y );
+
+	expected = new Float64Array( data.A_out );
+
+	out = dger( data.order, data.M, data.N, data.alpha, x, data.strideX, y, data.strideY, a, data.lda );
+	t.strictEqual( out, a, 'returns expected value' );
+	t.deepEqual( out, expected, 'returns expected value' );
+	t.end();
+});
+
+tape( 'the function returns the input matrix unchanged if input `x` filled with zeroes (column-major)', function test( t ) {
+	var expected;
+	var data;
+	var out;
+	var a;
+	var x;
+	var y;
+
+	data = cx0;
+
+	a = new Float64Array( data.A );
+	x = new Float64Array( data.x );
+	y = new Float64Array( data.y );
+
+	expected = new Float64Array( data.A_out );
+
+	out = dger( data.order, data.M, data.N, data.alpha, x, data.strideX, y, data.strideY, a, data.lda );
+	t.strictEqual( out, a, 'returns expected value' );
+	t.deepEqual( out, expected, 'returns expected value' );
+	t.end();
+});
+
+tape( 'the function returns the input matrix unchanged if input `y` filled with zeroes (row-major)', function test( t ) {
+	var expected;
+	var data;
+	var out;
+	var a;
+	var x;
+	var y;
+
+	data = ry0;
+
+	a = new Float64Array( data.A );
+	x = new Float64Array( data.x );
+	y = new Float64Array( data.y );
+
+	expected = new Float64Array( data.A_out );
+
+	out = dger( data.order, data.M, data.N, data.alpha, x, data.strideX, y, data.strideY, a, data.lda );
+	t.strictEqual( out, a, 'returns expected value' );
+	t.deepEqual( out, expected, 'returns expected value' );
+	t.end();
+});
+
+tape( 'the function returns the input matrix unchanged if input `y` filled with zeroes (column-major)', function test( t ) {
+	var expected;
+	var data;
+	var out;
+	var a;
+	var x;
+	var y;
+
+	data = cy0;
+
+	a = new Float64Array( data.A );
+	x = new Float64Array( data.x );
+	y = new Float64Array( data.y );
+
+	expected = new Float64Array( data.A_out );
+
+	out = dger( data.order, data.M, data.N, data.alpha, x, data.strideX, y, data.strideY, a, data.lda );
+	t.strictEqual( out, a, 'returns expected value' );
+	t.deepEqual( out, expected, 'returns expected value' );
+	t.end();
+});
+
+tape( 'the function returns  (row-major)', function test( t ) {
 	var expected;
 	var data;
 	var out;