Disable libvips cache for unit tests

Aids memory leak detection

test/unit/alpha.js

@@ -5,6 +5,8 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Alpha transparency', function() {
 
   it('Flatten to black', function(done) {

test/unit/blur.js

@@ -5,6 +5,8 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Blur', function() {
 
   it('specific radius', function(done) {

test/unit/colourspace.js

@@ -5,6 +5,8 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Colour space conversion', function() {
 
   it('To greyscale', function(done) {

test/unit/crop.js

@@ -5,6 +5,8 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Crop gravities', function() {
 
   it('North', function(done) {

test/unit/embed.js

@@ -5,6 +5,8 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Embed', function() {
 
   it('JPEG within PNG, no alpha channel', function(done) {

test/unit/extract.js

@@ -5,6 +5,8 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Partial image extraction', function() {
 
   it('JPEG', function(done) {

test/unit/gamma.js

@@ -5,6 +5,8 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Gamma correction', function() {
 
   it('value of 0.0 (disabled)', function(done) {

test/unit/interpolation.js

@@ -5,6 +5,8 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Interpolation', function() {
 
   it('nearest neighbour', function(done) {

test/unit/io.js

@@ -8,6 +8,8 @@ var semver = require('semver');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Input/output', function() {
 
   it('Read from File and write to Stream', function(done) {

test/unit/metadata.js

@@ -6,6 +6,8 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Image metadata', function() {
 
   it('JPEG', function(done) {

test/unit/resize.js

@@ -5,6 +5,8 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Resize dimensions', function() {
 
   it('Exact crop', function(done) {

test/unit/rotate.js

@@ -5,6 +5,8 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Rotation', function() {
 
   it('Rotate by 90 degrees, respecting output input size', function(done) {

test/unit/sharpen.js

@@ -5,6 +5,8 @@ var assert = require('assert');
 var sharp = require('../../index');
 var fixtures = require('../fixtures');
 
+sharp.cache(0);
+
 describe('Sharpen', function() {
 
   it('specific radius and levels 0.5, 2.5', function(done) {