added test

Author: DanielJDufour

Diff for: .gitignore

@@ -104,6 +104,8 @@ dist
 .tern-port
 
 # Data files
+*.TIF
+*.TIFF
 *.tif
 *.tiff
 *.xml

Diff for: test/data/setup.sh

@@ -11,6 +11,8 @@ gdal_edit.py -stats stats.tiff
 
 wget "https://landsat-pds.s3.amazonaws.com/L8/012/031/LC80120312013106LGN01/LC80120312013106LGN01_B6.TIF" -O LC80120312013106LGN01_B6.tif
 
+wget "https://landsat-pds.s3.amazonaws.com/c1/L8/024/030/LC08_L1TP_024030_20180723_20180731_01_T1/LC08_L1TP_024030_20180723_20180731_01_T1_B1.TIF" -O LC08_L1TP_024030_20180723_20180731_01_T1_B1.TIF
+
 # download Global Human Settlement Layer
 wget wget http://cidportal.jrc.ec.europa.eu/ftp/jrc-opendata/GHSL/GHS_POP_MT_GLOBE_R2019A/GHS_POP_E2015_GLOBE_R2019A_54009_250/V1-0/GHS_POP_E2015_GLOBE_R2019A_54009_250_V1_0.zip
 unzip GHS_POP_E2015_GLOBE_R2019A_54009_250_V1_0_8_4.zip

Diff for: test/test.js

@@ -7,6 +7,11 @@ const SECONDS_TO_MILLISECONDS = 1000;
 
 async function getStatsFromFilepath(filepath, debug=false) {
     const data = readFileSync(filepath);
+
+    if (data.byteLength === 0) {
+      throw new Error("This file has 0 bytes: " + filepath);
+    }
+
     const arrayBuffer = data.buffer.slice(data.byteOffset, data.byteOffset + data.byteLength);
     const geotiff = await fromArrayBuffer(arrayBuffer);
     const image = await geotiff.getImage();
@@ -42,12 +47,22 @@ describe("GeoTIFF.js Test Data", function() {
 });
 
 describe("Landsat Data", function() {
-  it('should get stats for downloaded Landsat Scene', async function() {
+  it('should get stats for old downloaded Landsat Scene', async function() {
     this.timeout(20 * SECONDS_TO_MILLISECONDS);
-    const { bands } = await getStatsFromFilepath('./test/data/LC80120312013106LGN01_B6.tif');
+    const debug = false;
+    const { bands } = await getStatsFromFilepath('./test/data/LC80120312013106LGN01_B6.tif', debug);
     expect(bands[0].min).to.equal(0);
     expect(bands[0].max).to.equal(62196);
   });
+  it('should get stats for newer downloaded Landsat Scene', async function() {
+    this.timeout(20 * SECONDS_TO_MILLISECONDS);
+    const debug = false;
+    const { bands } = await getStatsFromFilepath('./test/data/LC08_L1TP_024030_20180723_20180731_01_T1_B1.TIF', debug);
+    expect(bands[0].min).to.equal(0);
+    // this gives different results than GDAL, but is consistent with rasterio
+    // import rasterio; rasterio.open("./test/data/LC08_L1TP_024030_20180723_20180731_01_T1_B1.TIF").read()[0].max()
+    expect(bands[0].max).to.equal(54590);
+  });
   it('should get stats for online Landsat Scene with overview file', async function() {
     this.timeout(20 * SECONDS_TO_MILLISECONDS);
     const debug = false;