Merge branch 'development' into website/addPySRA

* development: (141 commits)
  Add missing CHANGELOG entry for OrderWatcher WS interface
  Bump up stale to close to 30 days
  Move onMessageAsync outside of tests and add comments
  Fix WS tests to remove race-condition and be more specific about the message expected
  Add temporary console.log to test failing on CI
  Make @0x/contracts-test-utils a dependency instead of a devDependency
  Fix test-publish failure in contracts packages
  Fixed solhint errors
  Added documentation to `LibAddressArray.append` and switched `if` to `require` smt
  Updated changelogs for new contracts
  Added `gas` field so tests pass on Geth;
  Added Changelog for new Extensions
  Updated comment `Execute fillOrder` -> `Execute exchange function`
  Explicit returns
  Prettier / Linter on contracts + TS
  Refactoring balance threshold filter
  Moved exchange calldata functions to separate mixin
  Less Assembly. More Solidity. Less Efficiency. More Readability.
  Run all tests for extensions
  Cleaned up tests for balance threshold filter
  ...

1 files changed, 18 insertions, 0 deletions

diff --git a/packages/instant/test/util/format.test.ts b/packages/instant/test/util/format.test.ts
index fe0a63e6e..38bf356ec 100644
--- a/packages/instant/test/util/format.test.ts
+++ b/packages/instant/test/util/format.test.ts
@@ -41,6 +41,18 @@ describe('format', () => {
         it('converts BigNumber(5.3014059295032) to the string `5.301 ETH`', () => {
             expect(format.ethUnitAmount(BIG_NUMBER_IRRATIONAL)).toBe('5.301 ETH');
         });
+        it('shows 1 significant digit when rounded amount would be 0', () => {
+            expect(format.ethUnitAmount(new BigNumber(0.00003))).toBe('0.00003 ETH');
+            expect(format.ethUnitAmount(new BigNumber(0.000034))).toBe('0.00003 ETH');
+            expect(format.ethUnitAmount(new BigNumber(0.000035))).toBe('0.00004 ETH');
+        });
+        it('shows < 0.00001 when hits threshold', () => {
+            expect(format.ethUnitAmount(new BigNumber(0.000011))).toBe('0.00001 ETH');
+            expect(format.ethUnitAmount(new BigNumber(0.00001))).toBe('0.00001 ETH');
+            expect(format.ethUnitAmount(new BigNumber(0.000009))).toBe('< 0.00001 ETH');
+            expect(format.ethUnitAmount(new BigNumber(0.0000000009))).toBe('< 0.00001 ETH');
+            expect(format.ethUnitAmount(new BigNumber(0))).toBe('0 ETH');
+        });
         it('returns defaultText param when ethUnitAmount is not defined', () => {
             const defaultText = 'defaultText';
             expect(format.ethUnitAmount(undefined, 4, defaultText)).toBe(defaultText);
@@ -86,6 +98,12 @@ describe('format', () => {
         it('correctly formats 5.3014059295032 ETH to usd according to some price', () => {
             expect(format.ethUnitAmountInUsd(BIG_NUMBER_IRRATIONAL, BIG_NUMBER_FAKE_ETH_USD_PRICE)).toBe('$13.43');
         });
+        it('correctly formats amount that is less than 1 cent', () => {
+            expect(format.ethUnitAmountInUsd(new BigNumber(0.000001), BIG_NUMBER_FAKE_ETH_USD_PRICE)).toBe('<$0.01');
+        });
+        it('correctly formats exactly 1 cent', () => {
+            expect(format.ethUnitAmountInUsd(new BigNumber(0.0039), BIG_NUMBER_FAKE_ETH_USD_PRICE)).toBe('$0.01');
+        });
         it('returns defaultText param when ethUnitAmountInUsd or ethUsdPrice is not defined', () => {
             const defaultText = 'defaultText';
             expect(format.ethUnitAmountInUsd(undefined, undefined, 2, defaultText)).toBe(defaultText);