From d02410fae49ced0e9b5ecc0b4a4f82fe5c78b8af Mon Sep 17 00:00:00 2001
From: Alex Watt <alex@alexcwatt.com>
Date: Wed, 23 Aug 2023 05:58:19 -0400
Subject: [PATCH] ProgressBar#current= supports indeterminate progress bars too

---
 CHANGELOG.md                  |  5 +++++
 lib/tty/progressbar.rb        |  6 +++++-
 spec/unit/set_current_spec.rb | 15 +++++++++++++++
 3 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6324ea6..817d898 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Change log
 
+## Unreleased
+
+### Fixed
+* Fix ProgressBar#current= for indeterminate progress bar by Alex Watt (@alexcwatt)
+
 ## [v0.18.2] - 2021-03-08
 
 ### Fixed
diff --git a/lib/tty/progressbar.rb b/lib/tty/progressbar.rb
index f176ffc..db41704 100644
--- a/lib/tty/progressbar.rb
+++ b/lib/tty/progressbar.rb
@@ -290,7 +290,11 @@ def update(options = {})
     #
     # @api public
     def current=(value)
-      value = [0, [value, total].min].max
+      unless value.is_a?(Numeric)
+        raise ArgumentError, "Expected a numeric value, got #{value.inspect} instead."
+      end
+
+      value = [0, [value, total].compact.min].max
       advance(value - @current)
     end
 
diff --git a/spec/unit/set_current_spec.rb b/spec/unit/set_current_spec.rb
index fd7e5ef..77520c9 100644
--- a/spec/unit/set_current_spec.rb
+++ b/spec/unit/set_current_spec.rb
@@ -33,6 +33,15 @@
     expect(progress.current).to eq(0)
   end
 
+  it "doesn't allow nil" do
+    progress = TTY::ProgressBar.new("[:bar]", output: output, total: 10)
+    expect { progress.current = nil }.to raise_error(
+      ArgumentError,
+      "Expected a numeric value, got nil instead."
+    )
+    expect(progress.current).to eq(0)
+  end
+
   it "cannot backtrack on finished" do
     progress = TTY::ProgressBar.new("[:bar]", output: output, total: 10)
     progress.current = 10
@@ -42,4 +51,10 @@
     output.rewind
     expect(output.read).to eq("\e[1G[==========]\n")
   end
+
+  it "allows setting progress when total is unknown" do
+    progress = TTY::ProgressBar.new("[:bar]", output: output, total: nil)
+    progress.current = 5
+    expect(progress.current).to eq(5)
+  end
 end